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MARU 310/320 DISTANCE MEASURING EQUIPMENT



Technical Manual VOLUME I SYSTEM DESCRIPTION, OPERATIONS AND MAINTENANCE



SECTION 1 GENERAL INFORMATION



Intentional Blank Page



MARU 310/320 DME Technical Manual Volume I, Section 1



Table of Contents SECTION 1.



GENERAL INFORMATION ................................................................................................ 1-1



1.1. INTRODUCTION...................................................................................................................................... 1-1 1.2. TECHNICAL SPECIFICATION ............................................................................................................... 1-5 1.2.1. General............................................................................................................................................... 1-5 1.2.2. TRANSMITTER .................................................................................................................................. 1-7 1.2.3. RECEIVER ......................................................................................................................................... 1-8 1.2.4. MONITOR ........................................................................................................................................ 1-10 1.2.5. POWER SUPPLY ............................................................................................................................. 1-10 1.3. SYSTEM DESCRIPTION ....................................................................................................................... 1-12 1.3.1. System Overview .............................................................................................................................. 1-12 1.3.2. Duplexer Unit, DPX ......................................................................................................................... 1-16 1.3.3. Receiver Unit, RXU .......................................................................................................................... 1-19 1.3.4. Transponder Control Unit, TCU ...................................................................................................... 1-21 1.3.5. Transmitter Unit, TXU...................................................................................................................... 1-24 1.3.6. Low Power Amplifier, LPA ............................................................................................................... 1-27 1.3.7. High Power Amplifier, HPA.............................................................................................................. 1-30 1.3.8. Monitor Unit, MON .......................................................................................................................... 1-33 1.3.9. Radio Frequency Generator Unit, RFG ........................................................................................... 1-36 1.3.10. Local Control Unit, LCU.................................................................................................................. 1-39 1.3.11. AC to DC Converter Unit, AC/DC ................................................................................................... 1-42 1.3.12. DC to DC Converter Unit, DC/DC .................................................................................................. 1-45 1.3.13. Backup Battery ................................................................................................................................. 1-47 1.3.14. Remote Control Monitor Unit, RCMU ............................................................................................. 1-48 1.3.15. Remote Monitor Unit, RMU ............................................................................................................. 1-50 1.3.16. Local/Remote Maintenance Monitoring System, LMMS/RMMS ...................................................... 1-52



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MARU 310/320 DME Technical Manual Volume I, Section 1



List of Figures Figure 1-1 MARU 310/320 DME System Cabinet ................................................................................. 1-2 Figure 1-2 Remote Control Monitoring Unit, RCMU............................................................................. 1-4 Figure 1-3 Remote Monitoring Unit, RMU ............................................................................................ 1-4 Figure 1-4 MARU 310/320 DME System Block Diagram ................................................................... 1-13 Figure 1-5 MARU 310/320 DME System Cabinet Front View ............................................................ 1-15 Figure 1-6 DPU Front View .................................................................................................................. 1-16 Figure 1-7 DPU Block Diagram............................................................................................................ 1-17 Figure 1-8 DPDT Coaxial Switch ......................................................................................................... 1-18 Figure 1-9 RXU Front View.................................................................................................................. 1-19 Figure 1-10 RXU Block Diagram ......................................................................................................... 1-19 Figure 1-11 TCU Front View ................................................................................................................ 1-21 Figure 1-12 TCU Block Diagram.......................................................................................................... 1-21 Figure 1-13 TXU Front View ................................................................................................................ 1-24 Figure 1-14 TXU Block Diagram ......................................................................................................... 1-25 Figure 1-15 LPA Front View ................................................................................................................. 1-27 Figure 1-16 LPA Block Diagram........................................................................................................... 1-28 Figure 1-17 HPA Front View................................................................................................................. 1-30 Figure 1-18 HPA Block Diagram .......................................................................................................... 1-31 Figure 1-19 MON Front View ............................................................................................................... 1-33 Figure 1-20 MON Block Diagram ........................................................................................................ 1-33 Figure 1-21 RFG Front View ................................................................................................................ 1-36 Figure 1-22 RFG Block Diagram .......................................................................................................... 1-37 Figure 1-23 CSP Front View ................................................................................................................. 1-39 Figure 1-24 LCU Block Diagram.......................................................................................................... 1-40 Figure 1-25 AC/DC Front View ............................................................................................................ 1-42 Figure 1-26 AC/DC Block Diagram...................................................................................................... 1-43 Figure 1-27 DC/DC Front View ............................................................................................................ 1-45 Figure 1-28 DC/DC Block Diagram ..................................................................................................... 1-45 Figure 1-29 Backup Battery Subrack Front View ................................................................................. 1-47 Figure 1-30 RCMU Front View ............................................................................................................ 1-48 Figure 1-31 RCMU Block Diagram ...................................................................................................... 1-48 Figure 1-32 RMU Front View ............................................................................................................... 1-50 Figure 1-33 RMU Block Diagram ........................................................................................................ 1-50 Figure 1-34 Startup Window ................................................................................................................. 1-52 Figure 1-35 Main Window .................................................................................................................... 1-53 Figure 1-36 Transponder Window......................................................................................................... 1-54 Figure 1-37 Monitor Window ............................................................................................................... 1-55



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MARU 310/320 DME Technical Manual Volume I, Section 1



Section 1. GENERAL INFORMATION 1.1.



INTRODUCTION MARU 310/320 DME is type “N” distance measuring equipment, primarily serving operational needs of en-route or TMA navigation, where the “N” stands for narrow spectrum characteristics. The DME system provides for continuous and accurate indication in the cockpit of the slant range distance of an equipped aircraft from an equipped ground reference point. MARU 310/320 DME is fully compliant with ICAO Annex 10 and EUROCAE ED-57 minimum performance specification. MARU 310/320 DME is designed to be fully solid state design with state-of-the-art surface mount technology. All materials, workmanship and tests are in accordance with the highest standards for this class of equipment. Figure 1-1 shows the system cabinet of MARU 310/320 DME.



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MARU 310/320 DME Technical Manual Volume I, Section 1



Figure 1-1 MARU 310/320 DME System Cabinet



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MARU 310/320 DME Technical Manual Volume I, Section 1



The key features of MARU 310/320 DME are as follows: Compact Design Full dual high-power transponder, dual monitor and dual backup batteries are included in an industry standard 19” rack cabinet for easy accessibility and maintenance. The equipment is fully solid-state design with no mechanically moving parts. Hot-swappable Plug-in Units Most of the system hardware components are line replaceable units, which are designed to be hot-swappable plug-in modules. Therefore operators can replace a live unit without powering off, and this makes it easier to carry out routine preventive maintenance service. Modernized microprocessor-based digital control All the system functions are monitored and controlled by high performance 16/32-bit microcontrollers. Most of the pulse waveforms are electronically synthesized using stateof-art direct digital synthesis technology. Long design life & durability Minimum 15 years of design life through normal and regular maintenance Designed to operate on 24hours a day and 365 days per year basis Protection from EMC radiation, high voltage, etc. Self Diagnostics The Built-In Self Test Equipment (BITE) function is included to check the integrity of system operation. The Built-In Self Test function is independent from the monitoring operation Full Local and Remote Control/Monitor By using high performance microprocessor based control/monitor circuitry, full local and remote monitoring and maintenance as well as fault finding from remote are possible with detailed system status including each LRU status. Also up to two slave indicators (RMU) can be connected for providing status indicator. Collocation with any VOR or ILS By using software programmable PLL frequency synthesizer and flexible IDENT keying interface, a collocation with any VOR or ILS equipment on any operational frequency/channel pair can be easily achieved. Both coaxial collocation and offset allocation can be implemented by means of programmable delay offset adjustment.



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MARU 310/320 DME Technical Manual Volume I, Section 1



Figure 1-2 shows the remote control monitoring unit, RCMU.



Figure 1-2 Remote Control Monitoring Unit, RCMU Figure 1-3 shows the remote monitoring unit, RMU



Figure 1-3 Remote Monitoring Unit, RMU



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MARU 310/320 DME Technical Manual Volume I, Section 1



1.2.



TECHNICAL SPECIFICATION



1.2.1.



General



1.2.1.1. Standard Compliance ICAO Annex 10, Chapter 3, paragraph 3.5 EUROCAE ED-57 1.2.1.2. System Performance Characteristics Aircraft handling capacity: 200 interrogators Accuracy: total system error < ±0.2 NM, at distances of from 0 to 370 km (200NM) Operating Frequency Range: 960 MHz – 1,215 MHz band Coverage: Nominal Line of Sight up to 200NM; Dependent upon site location, terrain, and aircraft altitude System Reply Delay: 50 us, nominal for X channel, 56 us, nominal for Y channel Adjustable from 35 us to 75 us Reply Delay Stability: -10 dBm to -81 dBm: ±0.5 us, -81 dBm to -91 dBm: ±0.8 us Reply Efficiency: better than 70%; up to 200 aircraft and at -91 dBm of receiver input level 1.2.1.3. Physical Dimensions System cabinet 1,922 mm (Height) x 600 mm (Width) x 600 mm (Depth), 180 kg (Weight) 1.2.1.4. Environmental Conditions Operating Temperature: -10°C ~ 55°C Indoor Equipment -40°C ~ 70°C Outdoor Equipment Relative Humidity:95% (temperature up to 35°C) 60% (temperature up to 55°C) Operating Altitude: up to 4,500m (15,000ft) Wind Load: up to 160 km/h 1.2.1.5. Reliability MTBF > 5,000 hours for dual system MTBO > 10,000 hours for dual system MTTR < 30 minutes, typical 1.2.1.6. Power Consumption MARU 310 – 190 W (cold-standby mode) / 230 W (hot-standby mode) or less Page 1-5



MARU 310/320 DME Technical Manual Volume I, Section 1



MARU 320 – 450 W (cold-standby mode) / 700 W (hot-standby mode) or less Without battery charging current.



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MARU 310/320 DME Technical Manual Volume I, Section 1



1.2.2.



TRANSMITTER



1.2.2.1. Frequency Range 962 MHz – 1,213 MHz, 1MHz channel spacing 1.2.2.2. Frequency Stability ± 0.001% (±12 kHz @ 1.2 GHz) 1.2.2.3. Channels 252 (1X - 126X, 1Y - 126Y) 1.2.2.4. Pulse Rise Time 2.5 μs ± 0.5 μs 1.2.2.5. Pulse Duration 3.5 μs ± 0.5 μs 1.2.2.6. Pulse Decay Time 2.5 μs ± 0.5 μs 1.2.2.7. RF Pulse Spectrum Per ICAO Annex 10, Paragraph 3.5.4.1.3 1.2.2.8. Pulse Pair Spacing X Channel: 12 μs ± 0.1, measured between 50% amplitude point of pulse pair Y Channel: 30 μs ± 0.1, measured between 50% amplitude point of pulse pair 1.2.2.9. Peak Power Output MARU 310 – 100 W, nominal, adjustable from 25% to 120% MARU 320 – 1,000 W, nominal, adjustable from 25% to 120% No significant re-adjustment or tuning for frequency change besides simple software settings Peak Power Stability: not differ more than 1dB for any constituent pulses of any pair of pulses No excessive RF power than the rated value is radiated due to any component failure. 1.2.2.10. Pulse Repetition Rate 700 pp/s – 5,400 pp/s Randomly distributed pulse pair (squitter) generator with adjustable pulse rate. Page 1-7



MARU 310/320 DME Technical Manual Volume I, Section 1



1.2.2.11. Spurious Radiation Lower than -80 dB of peak output power during intervals between individual pulses Lower than -40 dBm/kHz at out-of-band 10 to 1,800 MHz, excluding 960 to 1,215MHz Any CW harmonic of the carrier frequency on any DME channel < -10 dBm 1.2.2.12. IDENT signal Characteristic conforms to ICAO Annex 10, Paragraph 3.5.3.6 Pulse rate: 1,350 ± 25 pp/s 1.2.2.13. RF Input/Output Impedance 50 Ohms, nominal Protected against any impedance mismatching so as to withstand infinite VSWR. Abnormal VSWR condition is detected and indicated on both local/remote monitor devices. 1.2.3.



RECEIVER



1.2.3.1. Frequency Range 1,025 MHz – 1,150 MHz, paired with transmitter frequency as per para. 3.5.3.3.3, ICAO annex 10 Interrogation frequency appropriate to the assigned DME channel 1.2.3.2. Frequency Stability ± 0.001% (±12 kHz @ 1.2 GHz) 1.2.3.3. Transponder Sensitivity Better than -91 dBm for 70% reply efficiency Equivalent to -103 dBW/m2 in a typical installation 1.2.3.4. Dynamic Range Power density between -103 dBW/m2 and -22 dBW/m2 at transponder antenna 1.2.3.5. Sensitivity Variation Lower than 1 dB for transmission rate variation between 0% and 90% of the maximum Lower than 1 dB for variation in interrogation pulse pair spacing by up to ±1% 1.2.3.6. Automatic Load Limiting Activated when transponder loading exceeds 90% of the maximum transmission rate Sensitivity reduction range wider than 50 dB Page 1-8



MARU 310/320 DME Technical Manual Volume I, Section 1



1.2.3.7. Noise Generated Response Pulse Pair Less than 5% when interrogated at -103 dBW/m2 to produce a transmission rate equal to 90% of maximum transmission rate 1.2.3.8. Receiver Bandwidth Such that the transponder sensitivity level does not deteriorate by more than 3 dB when the total receiver drift is added to an incoming interrogation frequency drift of ±100 kHz total. Sufficient to maintain system the accuracy condition as in 3.5.4.2.6.2 of ICAO Annex 10 1.2.3.9. Off Channel Rejection Signals with 900 kHz or more offset within the receiver dynamic range does not trigger the transponder 1.2.3.10. Recovery Time The minimum sensitivity level is recovered within 3 dB of the normal value within 8 μs of the reception of a signal between 0 dB and 60 dB above minimum sensitivity level This is maintained no matter whether the echo suppression is enabled or disabled. 1.2.3.11. Spurious Suppression Higher than 80 dB for IF frequency spurious Higher than 75 dB for image frequencies and all other spurious within 960 MHz to 1,215 MHz 1.2.3.12. Echo Suppression Short Distance Echo Suppression (SDES): Echo pulses that occur between the pulses of a valid interrogation pair will not affect the reply timing by more than 0.15 μs Long Distance Echo Suppression (LDES): If enabled, echo pulses that fall after the dead time (60 μs) interval are suppressed. The duration for LDES can be set between 0 μs and 300 μs. 1.2.3.13. Reply Dead Time 60 μs, nominal Adjustable from 40 μs to 180 μs in steps of 1 μs 1.2.3.14.



Pulse Pair Decoder Characteristics Nominal value for pulse pair spacing: 12 μs for X channel, 36 μs for Y channel Any pulse pair with a spacing of ±1 μs or less from the nominal value is accepted with less than 1dB of sensitivity variation. Any pulse pair with a spacing of ±2 μs or more from the nominal value and with any signal level up to -10dBm is rejected.



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MARU 310/320 DME Technical Manual Volume I, Section 1



1.2.4.



MONITOR



1.2.4.1. Configuration Dual independent monitor with interrogation pulse generator Test interrogation signal generator with adjustable output frequency in 100 kHz step ‘AND’ mode or ‘OR’ mode 1.2.4.2. Executive Monitor Parameters Transponder delay: ±1 μs Transmitted power output: -3dB Receiver sensitivity: -6dB Pulse spacing: ±1 μs Frequency variation: Synthesizer PLL locking range Pulse width: ±0.5 μs Reply efficiency: < 70% Pulse repetition frequency: < 700 pp/s IDENT signal: missing or incorrect condition Alarm limits adjustable in steps of 1/10th of the tolerance 1.2.4.3. Maintenance Monitor Parameters Monitor self-test LRU status Power supply voltage levels History logging Antenna VSWR 1.2.4.4. Test Interrogation Signal Output Frequency: Adjustable from 1025 MHz to 1150 MHz in step of 100kHz Output Level: Adjustable from -100dBm to -25dBm in steps of 1dB Output PRF: Adjustable from 100 pp/s to 4,800 pp/s 1.2.5.



POWER SUPPLY



1.2.5.1. Configuration Dual redundant AC/DC converter Dual redundant DC/DC converter Parallel battery backup/charging capability Standard 65AH maintenance-free battery can sustain the system up to 4 hours 1.2.5.2. AC/DC Converter Input voltage: AC 110V/220 V ±20%, nominal Page 1-10



MARU 310/320 DME Technical Manual Volume I, Section 1



Input frequency: 47 Hz ~ 63 Hz Output voltage: 27 V, nominal Built-in Over Voltage Protection Built-in Over Current Protection Built-in Over Temperature Protection 1.2.5.3. DC/DC Converter Input voltage: 27V, nominal Output voltage: 50V, nominal Built-in Over Voltage Protection Built-in Over Current Protection Built-in Over Temperature Protection



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MARU 310/320 DME Technical Manual Volume I, Section 1



1.3.



SYSTEM DESCRIPTION



1.3.1.



System Overview The MARU 310/320 DME comprises two DME/N transponders, two independent monitors and two AC/DC power supplies with backup batteries. The transponders can be configured as dual system capable of working as main and standby. Any of the system can be designated as main. The other automatically works as standby. The changeover between the main and standby can be either initiated by an operator command or automatically by the monitor system when an executive alarm condition is detected. The monitors can be configured such that both monitors are monitoring the main transponder simultaneously or such that one monitor is monitoring the main transponder and the other is monitoring the standby transponder. When two monitors are monitoring the main transponder, they can be configured either in ‘AND’ mode or in ‘OR’ mode for a changeover or a complete shutdown in the event of failure. The two power supplies work in parallel sharing load currents in normal condition. When one of the power supplies fails, the other power supply continues to provide enough power for the dual system with “no break’ operation. The power supplies also charge the backup batteries. When the mains power is interrupted, the backup batteries supply the power for the system with “no-break” operation. Figure 1-4 shows a simplified system block diagram of MARU 310/320 DME with dual transponder and dual monitor configuration.



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MARU 310/320 DME Technical Manual Volume I, Section 1



Figure 1-4 MARU 310/320 DME System Block Diagram



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MARU 310/320 DME Technical Manual Volume I, Section 1



Figure 1-5 shows a front view of the system cabinet and location of each unit. For single transponder configuration, unnecessary slots are covered with blank panels.



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MARU 310/320 DME Technical Manual Volume I, Section 1



Figure 1-5 MARU 310/320 DME System Cabinet Front View



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MARU 310/320 DME Technical Manual Volume I, Section 1



1.3.2.



Duplexer Unit, DPX



1.3.2.1. Overview Figure 1-6 shows a front view of DPU and location in the system cabinet.



Figure 1-6 DPU Front View Figure 1-7 shows the block diagram of DPU.



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MARU 310/320 DME Technical Manual Volume I, Section 1



(From LPA1 or HPA1)



DPU Module RF Board



Circulator



TX1



(To RXU1) RX1



TX1 Couple(-60dBc) (To Front panel)



Coupler Tuneable BPF BW=4MHz 3dB Hybrid Coupler



(From RF1/2) INT1 INT2 RX2 (To RXU2)



DME Antenna



RVSDET1 FWDDET1 FWDDET2 RVSDET2 (To CNT Board)



Tuneable BPF BW=4MHz



DPDT Switch



Switch Control Sig. Switch Status Sig.



Dummy Load



Coupler



TX2 (From LPA2 or HPA2)



TX2 Couple(-60dBc) (To Front panel)



Circulator



DPU Module CNT Board Switch Control & Command Sig.



Changeover Control



(From LCU/MON)



+24V GND



Arrestor



DC/DC Converter



Switch Control Sig. Switch Status Sig. (To DPDT Switch) Status & Command Signal (To TCU/MON)



RVSPWR_TXP1



RVSDET1 FWDDET1



FWDPWR_TXP1 Buffer



FWDDET2



FWDPWR_TXP2



RVSDET2



RVSPWR_TXP2 (To MON1/2)



+5V +15V -15V GND



Figure 1-7 DPU Block Diagram 1.3.2.2. Function The DPU provides the following functions: … … … …



System changeover transfer with configurable AND/OR mode System shutdown Output power level measurement Injection of DME test interrogation signal for MON.



1.3.2.3. Description The transmit signal coming out of the LPA (MARU 310) or HPA (MARU 320) is isolated from receive signal by a circulator. The output signal from the circulator is fed to DPU module, which contains directional couplers and power detector circuitries. Finally the output is changeover controlled by DPDT and live output is fed to the antenna via a lightning arrester and standby output is fed to a dummy load. The receive signal coming through the reverse of the transmit path is isolated from transmit signal by a circulator and fed to the receiver unit, RXU via a tunable BPF. The tunable filter is adjusted for selected station channel frequency.



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MARU 310/320 DME Technical Manual Volume I, Section 1



The DPU module contains a 30 dB directional coupler, a 20 dB directional coupler and a 3 dB hybrid coupler. The 30dB directional coupler is for sampling transmitter signal output and the 20 dB directional coupler along with the 3 dB hybrid coupler is used for injecting test interrogation signal from MON/RFG. Power detector for measuring RF power output level comprises RF schottky barrier diodes and OP amp buffers. The control board contains circuitry for controlling transponder changeover and system shutdown. Signals indicating executive alarm conditions from two monitors are fed to the control board. As two monitors vote for changeover, AND mode or OR mode can be selected. Also bypass control input disables transponder changeover and system shutdown even when alarm conditions are detected.



TX1 / RX1 path



DPDT Switch C1-2-LIS



DME Antenna



Switch Control Sig. Arrestor



DPU Module



Dummy Load Switch Status Sig.



TX2 / RX2 path



Figure 1-8 DPDT Coaxial Switch The Double-Pole-Double-Throw (DPDT) switch is a RF coaxial relay with two pair of RF ports. The DPDT coaxial relay actually switches the RF signal path across the antenna for active transmitter and the RF dummy load for standby transmitter. The relay drive signal is fed the control board under control of MON. On the front panel of DPU, three indicator LEDs and two SMA test ports providing RF sample of transmitter output.



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MARU 310/320 DME Technical Manual Volume I, Section 1



1.3.3.



Receiver Unit, RXU



1.3.3.1. Overview Figure 1-9 shows a front view of RXU and location in the system cabinet.



Figure 1-9 RXU Front View Figure 1-10 shows the block diagram of RXU.



Figure 1-10 RXU Block Diagram Page 1-19



MARU 310/320 DME Technical Manual Volume I, Section 1



1.3.3.2. Function The RXU provides the following functions: … … …



Detection and recovery of incoming interrogation pulse pair Discrimination of ON channel and OFF channel Adjusting receive sensitivity



1.3.3.3. Description The RF down converter converts received RF signal with frequency range between 1025 MHz and 1150 MHz into 63 MHz intermediate frequency signal. The received signal from DPU is fed to a high dynamic range double balanced mixer and filtered by LC band pass IF filter. The local oscillator signal is a CW signal with the frequency same as that of transmitter and supplied from the TXU. The Variable RF attenuator attenuates the received signal to desensitize the receiver in case the load level is over a threshold point by a control of TCU. The attenuation range is from 0 dB to 80 dB. The signal from the attenuator is fed to a channel filter and gets divided into by a two-way divider. One output of the two-way divider is fed to a logarithmic detector. The output of the log detector is fed to TCU.



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MARU 310/320 DME Technical Manual Volume I, Section 1



1.3.4.



Transponder Control Unit, TCU



1.3.4.1. Overview Figure 1-11 shows a front view of TCU and location in the system cabinet.



Figure 1-11 TCU Front View Figure 1-12 shows the block diagram of TCU.



Figure 1-12 TCU Block Diagram



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MARU 310/320 DME Technical Manual Volume I, Section 1



1.3.4.2. Function TCU provides the following functions: … … … … … … … … …



Sampling and quantization of received signal Decoding of received pulse pair Generation of system delay Echo suppression Generation of pulse modulation signal Measurement and adjustment of reply pulse pairs Generation of squitter pulse pairs and IDENT pulse pairs Load limiting by controlling receiver sensitivity Generation of station frequency for both transmitter and receiver



1.3.4.3. Description In the heart of the TCU, two large scale field programmable gate arrays (FPGAs) and a highperformance 16/32-bit microcontroller are comprised. The log video signal of received pulse pair is fed via buffer to a high speed analog-to-digital converter, which digitize each video sample of input pulse pair. The stream of digitized video signals are queued onto a FIFO and numerically processed to evaluate the pulse pair coding. All the processing logic is built into a FPGA 1. When valid interrogation pulse pair is detected, a trigger pulse is generated at the point 50% amplitude. The trigger pulse is fed to the other FPGA and causes it to initiate a reply pulse generation after fixed time delay. The reply pulse is generated by using combination and sequential digital logic circuitry. The pulse modulation signal is a Gaussian shape pulse signal. It is numerically synthesized and converted to an analog pulse through a digital-to-analog converter. The echo suppression is provided under control of the second FPGA. Measurements of reply pulse pair is done by sampling the transmit signal from the LPA or HPA. The sampled pulse signal is digitized by an analog-to-digital converter. The stream of digitized data samples are processed in similar way as the MON does and measured parameters are used to complement output pulse shape. The squitter signal is a pulse pair with random interval, transmitted even in no interrogation signal is present. The squitter signal is generated in the FPGA 1 and its pulse repetition is programmable via the microcontroller on the TCU. The IDENT signal is also generated in the FPGA 1 and its Morse code keying is controlled by TCU software. The TCU monitors the load level of received interrogation pulse pairs. If the load level is Page 1-22



MARU 310/320 DME Technical Manual Volume I, Section 1



increased beyond a preset threshold level, the TCU lowers the control voltage supplied to the attenuator in the DPU, so as to desensitize the receiver responding range and eventually limits load level. The TCU provides the serial setup data for the phase locked loop (PLL) frequency synthesizers of both transmitter and receiver with the station frequency.



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MARU 310/320 DME Technical Manual Volume I, Section 1



1.3.5.



Transmitter Unit, TXU



1.3.5.1. Overview Figure 1-13 shows a front view of TXU and location in the system cabinet.



Figure 1-13 TXU Front View Figure 1-14 shows the block diagram of TXU.



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MARU 310/320 DME Technical Manual Volume I, Section 1 TPLL_DATA, TPLL_CLK, TPLL_EN



From TCU To TCU



TPLL_LD 2



1 TCXO



PLL Module



6



4



Drive Amplifier



To Front Panel FREQ -20dBm(CW)



To MON FD 1.5Vpp at 1KΩ



FREQ DET



5



AGC Attenuator



3



7 Splitter



To RXU Local +4dBm(CW)



2Way & AGC



TXU AGC



To TCU



TXU_RF_ON 8



9 RF Switch



Final Amplifier



11 Coupler & Detector



10 Rectangular Shape Pluse Modulation Circuit +24V GND



12 DC/DC Converter



To LPA TXU OUT +22dBm(Peak Power)



To Front Panel TXU ENV 3Vpp at 1KΩ



+5V GND



Figure 1-14 TXU Block Diagram 1.3.5.2. Function TXU provides the following functions: … … … … …



Generation of transmit carrier reference signal Pre-scaling the reference signal for use with frequency monitoring Binary modulation of transmit signal Providing the local oscillator signal for the RXUr Providing automatic gain control to maintain constant output power level



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From TCU Pulse_MOD



MARU 310/320 DME Technical Manual Volume I, Section 1



1.3.5.3. Description TCXO generates a stable reference frequency for the PLL frequency synthesizer PLL frequency synthesizer synthesizes CW signal with a station frequency from the reference signal from the TCXO. Driver amplifier The output signal from the PLL frequency synthesizer is amplified to -20dBm, a level to drive the final amplifier AGC attenuator The transmit carrier signal should be regulated by an AGC circuit to maintain stable amplitude. The attenuator is used to control amplitude of the transmit signal. The AGC control signal is generated by converting detected sample of output signal into a dc signal. A two-way power splitter, RF schottky diodes and OP amp circuitry are used for this purpose. Frequency detector To monitor integrity of the station frequency, a sample of generated transmit signal is prescaled by 1/80 and fed to a TCU, which measures the station frequency by counting the number of pulses per unit time. RF Switch RF switch is used to modulate the CW input signal with rectangular pulse shape. This is done by switching on/off the input signal in sync with the modulation signal. Final amplifier The final amplifier amplifies the input signal from the drive amp to a 100W of peak power. Coupler & Detector The signal from the final amplifier is supplied to either DPU or HPA through a directional coupler. The directional coupler samples a small amount of RF energy and RF schottky diode detects the RF signal envelope. DC/DC converter A built-in DC-to-DC converter takes +24V DC input and converts it into multiple DC voltages, including +5V, ±15V and +10V needed for each circuitry.



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MARU 310/320 DME Technical Manual Volume I, Section 1



1.3.6.



Low Power Amplifier, LPA



1.3.6.1. Overview Figure 1-15 shows a front view of LPA and location in the system cabinet.



Figure 1-15 LPA Front View



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MARU 310/320 DME Technical Manual Volume I, Section 1



Figure 1-16 shows the block diagram of LPA.



Figure 1-16 LPA Block Diagram 1.3.6.2. Function The LPA provides the following functions: … … … …



Amplification of transmit signal up to a level of 100W peak. Pulse modulation of transmit signal Monitors internal temperature Detection of RF output level



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MARU 310/320 DME Technical Manual Volume I, Section 1



1.3.6.3. Description The input signal to LPA is amplified through four stages of RF amplifier up to +52dBm peak. Total power gain is 30 dB with ±1 dB of tolerance. The first stage of amplifier is driven by a GaAs FET and operated as class A. The reset of the stages are driven by RF bipolar junction transistors and operated as class C. Gaussian shape pulse modulation is applied onto first three stages of amplifiers. The current flow to each drain/collector is modulated by the modulation signal, which has a Gaussian shape with rectangular pedestal. The final output signal is fed to a isolator for protection against possible mismatching and the resulting reflected power. Proper protection against possible damage from absence of negative bias supply voltage is provided. Also inside temperature is monitored with a digital temperature sensor, whose output is fed to TCU. RF output signal is sampled by a 35 dB directional coupler for envelop detection and for a BITE. A schottky barrier diode and op amps are used for envelop detection and BITE functions. A DC/DC converter is built into the LPA. The DC/DC converter takes +24V input supply and generates necessary voltages including +10V, ±15V, and ±5V. Also a hot-swap controller is built around the DC/DC converter circuits. The +50V DC input is supplied from an external DC/DC converter.



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1.3.7.



High Power Amplifier, HPA



1.3.7.1. Overview Figure 1-17 shows a front view of HPA and location in the system cabinet.



Figure 1-17 HPA Front View



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MARU 310/320 DME Technical Manual Volume I, Section 1



Figure 1-18 shows the block diagram of HPA.



Figure 1-18 HPA Block Diagram



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MARU 310/320 DME Technical Manual Volume I, Section 1



1.3.7.2. Function HPA is equipped only in MARU 320 DME, which is 1 kW output version. The HPA provides the following functions: … … … … …



High-power amplification of DME response signal Additional Gaussian shape pulse modulation Adjustment of power output Monitoring of inside temperature Detection of RF output power



1.3.7.3. Description The HPA takes input of peak power 44.5 dBm from the output of LPA and amplifies it with maximum gain of up to 17.5 dB. To maintain stable constant amplitude, a sample of output power is detected and fed back to TCU for digital control of output amplitude. The HPA comprises two stages of amplification. The first stage is driven by a bipolar transistor operating as class C. Besides the modulation in LPA, additional pulse modulation is applied to the first stage of HPA. The final stage is driven by four transistors combined in parallel operating as class C. Like LPA, the final output signal is fed to a isolator for protection against possible mismatching and the resulting reflected power. Supervisory circuits similar to that of LPA are provided including a digital temperature sensor for monitoring inside temperature and a directional coupler, an envelop detector and op circuits for detecting RF output power. A built-in DC/DC converter takes +24V input and generates necessary voltages including +10V, ±15V, and ±5V. Also a hot-swap controller is built around the DC/DC converter circuits. The +50V DC input is supplied from an external DC/DC converter.



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MARU 310/320 DME Technical Manual Volume I, Section 1



1.3.8.



Monitor Unit, MON



1.3.8.1. Overview Figure 1-19 shows a front view of MON and location in the system cabinet.



Figure 1-19 MON Front View Figure 1-20 shows the block diagram of MON.



Figure 1-20 MON Block Diagram Page 1-33



MARU 310/320 DME Technical Manual Volume I, Section 1



1.3.8.2. Function MON provides the following functions: … … … … … … …



Measurement and monitoring of pulse power output level, spectrum, and pulse parameters including reply delay, spacing, duration, and rising/decay time of reply pulse pair Monitoring of transponder and test interrogation RF signal generator (RFG) Detection and monitoring of IDENT code output Monitoring of receiver sensitivity Generation of modulation signal for RFG Measurement of RFG interrogation signal Built-In Self Test



1.3.8.3. Description MON is built around a high performance microcontroller with large scale FPGA and a number of analog-to-digital converters and digital-to-analog converters. Most of the measurement and evaluation functions are built into the FPGA hardware, so that software operation does not affect stability and integrity of the MON functions. Programmable alarm limits are loaded into the FPGA registers and hardware comparison logic circuits provide transponder changeover / shutdown signal in case of an alarm condition persists for a preset period of time. All the measurement results and monitored status information is collected by the microcontroller and presented to operator via LCU. The monitor causes an alarm to be indicated on all the local and remote monitoring equipments and automatically transfers to standby transponder if the transponder delay differs from the normal value (50 μs for X channel, 56 μs for Y channel) by 0.5 μs or more Also, the monitor can be configured to cause an alarm when the following conditions arise: a) a fall of 3 dB or more in transponder transmitted power output b) a fall of 6 dB or more in the minimum transponder receiver sensitivity c) the spacing between the first and second pulse of the transponder reply pulse pair differs from the normal value by 1 μs d) variation of the transponder receiver and transmitter frequency beyond the control range of the reference circuit Primary parameters are those parameters which, if outside specification, may be the cause of false guidance or a degradation of accuracy. Other monitored parameters are defined as secondary. Primary parameters are the reply delay and the pulse pair spacing. When a primary alarm is detected, the system initiates a changeover to standby transponder if the standby transponder is with no primary alarm. If the standby transponder is with a primary alarm, Page 1-34



MARU 310/320 DME Technical Manual Volume I, Section 1



the system initiates a complete shutdown. When a secondary alarm is detected, the system initiates a changeover to the standby transponder if the standby transponder is with no alarm. Otherwise, no further action other than alarm indication is taken. The time that any of the conditions and malfunctioning enumerated above can persist before an executive action of a transfer or a complete shutdown takes place is adjustable by software from 0 up to 10 seconds. In any cases, the transponder is not triggered more than 120 seconds per second for either monitoring or automatic frequency control purposes, or both. Failure of any part of the monitor itself automatically produces the same results as the malfunctioning of the element being monitored.



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MARU 310/320 DME Technical Manual Volume I, Section 1



1.3.9.



Radio Frequency Generator Unit, RFG



1.3.9.1. Overview Figure 1-22 shows a front view of RFG and location in the system cabinet.



Figure 1-21 RFG Front View



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MARU 310/320 DME Technical Manual Volume I, Section 1



Figure 1-22 shows the block diagram of RFG. RPLL_DATA, RPLL_CLK, RPLL_EN RPLL_LD 2



1 TCXO



6



4



AGC Attenuator



3



PLL Module



Drive Amplifier



7 RF Switch & AMP



Splitter & AGC



8 RFG AGC



Rectangular Shape Pluse Modulation Circuit



From MON RFG_PULSE_MOD



To MON



RFG_RF_ON 9 Gaussian Modulation AMP1



To Front Panel FREQ -20dBm(CW)



To MON FD 1.5Vpp at 1KΩ



FREQ DET



5



From MON To MON



11



Variable Attenuator



12 Gaussian Modulation AMP2



To DPU RFG OUT +30 ~ -70dBm (Peak Power) To Front Panel RF SAMPLE Sampling값: -25dB From MON RFG_ATT1 RFG_ATT2



10



Gaussian Shape Pluse Modulation Circuit



+24V



13 DC/DC Converter



GND



From MON RFG_GAU_MOD



+5V +15V +10V -15V GND From MON RFG_BITE



Figure 1-22 RFG Block Diagram



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MARU 310/320 DME Technical Manual Volume I, Section 1



1.3.9.2. Function RFG provides the following functions: … … …



Generation of RF signal for the monitor interrogator Amplification of the test interrogation signal Self monitoring of test interrogation signals



1.3.9.3. Description TCXO generates a stable reference frequency for the PLL frequency synthesizer PLL frequency synthesizer synthesizes CW signal with a station frequency from the reference signal from the TCXO. Drive amplifier The output signal from the PLL frequency synthesizer is amplified to -20dBm and fed to the AGC attenuator. AGC attenuator The transmit carrier signal should be regulated by an AGC circuit to maintain stable amplitude. The attenuator is used to control amplitude of the transmit signal. The AGC control signal is generated by converting detected sample of output signal into a dc signal. A two-way power splitter, RF schottky diodes and OP amp circuitry are used for this purpose. Frequency detector To monitor integrity of the station frequency, a sample of generated transmit signal is prescaled by 1/80 and fed to a TCU, which measures the station frequency by counting the number of pulses per unit time. RF switch RF switch is used to modulate the CW input signal with rectangular pulse shape. This is done by switching on/off the input signal in sync with the modulation signal. Gaussian shape pulse modulator/ amplifier The rectangular pulse modulated interrogation signal is modulated by two stages of Gaussian shape modulators. Between two stages of Gaussian shape modulator, a variable attenuator is inserted. Variable attenuator The programmable variable attenuator is located between two Gaussian shape pulse modulators. The variable attenuator is controlled by MON for measuring receiver sensitivity. DC/DC converter A built-in DC-to-DC converter takes +24V DC input and converts it into multiple DC voltages, including +5V, ±15V and +10V needed for each circuitry. Page 1-38



MARU 310/320 DME Technical Manual Volume I, Section 1



1.3.10.



Local Control Unit, LCU



1.3.10.1. Overview The LCU is located behind the Control Status Panel, CSP. CSP can be open from the front and can be flipped down for accessing the embedded LCU. Figure 1-23 shows a front view of CSP and location in the system cabinet.



Figure 1-23 CSP Front View



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MARU 310/320 DME Technical Manual Volume I, Section 1



Figure 1-24 shows the block diagram of LCU.



Figure 1-24 LCU Block Diagram 1.3.10.2. Function LCU provides the following functions: … … … … … … … …



Data exchange mediation between TCU 1/2, MON 1/2, LMMS, RMMS and RCMU Monitoring of LPA and HPA inside temperature Control of cooling fans Monitoring of AC/DC and DC/DC status Monitoring of shelter environment User interface using built-in CSP Providing a real time clock Audio alerting and providing IDENT keying sound



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MARU 310/320 DME Technical Manual Volume I, Section 1



1.3.10.3. Description The LCU is made up of a high performance 32-bit microprocessor with necessary glue logic, memory, serial communication controllers and peripheral devices. A 32-bit microprocessor with 4 built-in serial communication controllers, MPC860 is the core controller for the LCU. One of its serial controllers, SCC1 is used as an Ethernet controller for connecting with a TCP/IP based RMMS/LMMS. SCC2 is used as a RS-232C controller for debug terminal. SCC3 and SCC4 are used as RS-232C controller for communicating with MON1 and MON2 respectively. SMC1 and SMC2 are also used as RS-232C controller for communicating with TCU1 and TCU2 respectively. Three external 16C2550 dual UART controllers are used for remote communication with RCMU, RMU or RMMS via modem or direct line. Temperature sensors and cooling fans and other supervisory sensors are connected to the LCU via general purpose input/output interface. Two analog-to-digital converters for monitoring AC/DC or DC/DC power supply are provided. Electrically isolated by using opto-couplers IDENT keyer and equipment status output interface are provided for collocation with other navaids equipment, such as VOR and ILS. For direct access to the system control and status info from the front panel of the system cabinet, a graphic LCD and a keypad are directly interfaced to the microcontroller of the LCU. For audio alerting of alarm conditions, a loud speaker is enclosed inside the LCU housing. This speaker is also used for audio monitoring of IDENT keying and the LCU has a tone generator for it. A secure digital card (SD card) interface is provided for history logging.



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MARU 310/320 DME Technical Manual Volume I, Section 1



1.3.11.



AC to DC Converter Unit, AC/DC



1.3.11.1. Overview Figure 1-25 shows a front view of AC/DC and location in the system cabinet.



Figure 1-25 AC/DC Front View



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MARU 310/320 DME Technical Manual Volume I, Section 1



Figure 1-26 shows the block diagram of AC/DC.



Figure 1-26 AC/DC Block Diagram 1.3.11.2. Function AC/DC converter provides the following functions: … … … …



Generation of DC 24V from AC mains power input Charging of backup batteries Protection of backup batteries Supervisory monitoring of output voltages and currents



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MARU 310/320 DME Technical Manual Volume I, Section 1



1.3.11.3. Description The AC/DC is made up of commercial off-the-shelf SMPS modules, backup battery charger and surrounding supervisory circuits. The HWS1500-24 module is at the heart of the AC/DC and generates +24V DC voltage with maximum current of 70A. The battery charger circuit provides charging current for the backup batteries. Proper protection for backup battery is provided to avoid over-discharging.



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MARU 310/320 DME Technical Manual Volume I, Section 1



1.3.12.



DC to DC Converter Unit, DC/DC



1.3.12.1. Overview Figure 1-27 shows a front view of DC/DC and location in the system cabinet.



Figure 1-27 DC/DC Front View



Figure 1-28 shows the block diagram of DC/DC.



Figure 1-28 DC/DC Block Diagram



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MARU 310/320 DME Technical Manual Volume I, Section 1



Function DC/DC Converter provides the following functions: … …



Generation of +50V DC voltage Supervisory monitoring of output voltages and currents



1.3.12.2. Description The DC/DC converter is also made up of commercial off-the-shelf DC/DC converter modules. Two PAH300S24-28 DC/DC converter modules are used in series to produce +50V DC voltage. Proper protection against over-voltage and over-current and supervisory monitoring circuitry is provided for BITE.



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MARU 310/320 DME Technical Manual Volume I, Section 1



1.3.13.



Backup Battery



1.3.13.1. Overview Figure 1-29 shows a front view of back battery subrack and location in the system cabinet.



Figure 1-29 Backup Battery Subrack Front View 1.3.13.2. Description The backup battery provides emergency backup electricity when AC power input is discontinued. The backup battery is composed of four maintenance-free lead-acid batteries. Two of the batteries are wired in series to produce +24V respectively. The batteries are contained in two lower subtracts of system cabinet. On the front panel cover of each battery subrack, a circuit breaker switch is installed to isolate the batteries from the system electrics and gets cut-off in case of over current flows. Page 1-47



MARU 310/320 DME Technical Manual Volume I, Section 1



1.3.14.



Remote Control Monitor Unit, RCMU



1.3.14.1. Overview Figure 1-30 shows a front view of RCMU.



Figure 1-30 RCMU Front View



Main Clock : 29.4912MHz



MPU SRAM



Buffer



UART Clock : 14.7456MHz DATA



ROM



SCC1



Buffer



Figure 1-31 shows the block diagram of RCMU.



UART



RS232 Driver



UART



RS232 Driver



UART



RS232 Driver



RS232 /1, RS232/2



Socket Modem1



MODEM RS232



Buffer



RS485/1, RS485/2



RS232 (Not Used)



EPLD RS232 Driver



DVOR Status Microprocessor Part Communication Part



Alarm Sound



Amp



Speaker out



DATA



Buffer



Buffer



Alarm Sound



Graphic LCD



R-CSP



KEY & LED



+5V



SMPS



Power [+5V]



R-CSP I/F



Figure 1-31 RCMU Block Diagram 1.3.14.2. Description The RCMU has the same front panel control as the CSP on the system cabinet. Most of the functions that are provided with the CSP are also supported with RCMU except some of the functions that are inherently local. The RCMU is connected to the LCU through a two-wire leased-line or a dial-up line using built-in high speed modem that is capable of exchanging data at a rate of up to 33,600bps. Optionally, the RCMU supports two RS-232C interfaces for direct connection to the main system cabinet at short distance using a RS-232C cross cable or external data links such as wireless data modem. Page 1-48



MARU 310/320 DME Technical Manual Volume I, Section 1



Up to two slave remote monitoring units (RMU) can be connected to the RCMU via a pair of RS485 compatible balanced lines.



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MARU 310/320 DME Technical Manual Volume I, Section 1



1.3.15.



Remote Monitor Unit, RMU



1.3.15.1. Overview Figure 1-32 shows a front view of RMU.



Figure 1-32 RMU Front View Figure 1-33 shows the block diagram of RMU.



Main Clock : 14.7456MHz



TXD RXD



RS485_TXD RS485 Driver U301



RS485_RXD



Alarm Sound



Amp



RS485 Driver Alarm Sound



MPU U300



LED Control



Sink Driver U400



LED Bar LED400~LED405



LED Drive +5V KEY Input



Silence KEY



Lamp Test KEY



Microprocessor Part Key Input Alarm Sound



Figure 1-33 RMU Block Diagram



Page 1-50



SMPS



Power [+5V]



Speaker out



MARU 310/320 DME Technical Manual Volume I, Section 1



1.3.15.2. Description The RMU provides simple monitoring functions only. An 8-bit microcontroller is employed for the RMU. The RMU is housed in a small box with a dedicated power supply. A number of LED indicators placed on the front of the RMU shows brief status of the system. In addition a loud speaker is contained in the RMU to provide audible alert. The RMU can be connected to the LCU directly through RS-232C or RS-422/485 interface or connected to a RCMU through the same communication link.



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MARU 310/320 DME Technical Manual Volume I, Section 1



1.3.16.



Local/Remote Maintenance Monitoring System, LMMS/RMMS



1.3.16.1. Overview Figure 1-34 shows the startup screen of LMMS/RMMS.



Figure 1-34 Startup Window



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MARU 310/320 DME Technical Manual Volume I, Section 1



Figure 1-35 shows the main screen layout of LMMS/RMMS.



Figure 1-35 Main Window



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MARU 310/320 DME Technical Manual Volume I, Section 1



Figure 1-36 is a screenshot of LMMS/RMMS transponder screen.



Figure 1-36 Transponder Window



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MARU 310/320 DME Technical Manual Volume I, Section 1



Figure 1-37 is a screenshot of LMMS/RMMS monitor screen.



Figure 1-37 Monitor Window



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MARU 310/320 DME Technical Manual Volume I, Section 1



Page 1-56



MARU 310/320 DISTANCE MEASURING EQUIPMENT



Technical Manual



VOLUME I SYSTEM DESCRIPTION, OPERATIONS AND MAINTENANCE



SECTION 2 INSTALLATION



Intentional Blank Page



MARU 310/320 DME Technical Manual Volume I, Section 2



Table of Contents Section 2. INSTALLATION................................................................................................... 2-1 2.1. INTRODUCTION ................................................................................................. 2-1 2.1.1. SAFETY PRECAUTIONS.............................................................................. 2-1 2.2. INSTALLATION ................................................................................................... 2-2 2.3. INSTALLATION SITE SELECTION ..................................................................... 2-2 2.4. EQUIPMENT SITE LOCATION ........................................................................... 2-3 2.5. UNPACKING, PACKING, AND SHIPPING .......................................................... 2-3 2.6. INSTALLATION CABLES .................................................................................... 2-4 2.6.1. Rack Wiring Diagram ( RF Cable, rear view, including wiring number ) ....... 2-5 2.6.2. Detail wire description (RF cable) ................................................................. 2-6 2.6.3. Rack Wiring Diagram ( Signal Cable, rear view, including wiring number ) 2-12 2.6.4. Detail wire description(Signal cable) ........................................................... 2-13 2.6.5. Caution (before wiring cables)..................................................................... 2-19



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MARU 310/320 DME Technical Manual Volume I, Section 2



Page ii



MARU 310/320 DME Technical Manual Volume I, Section 2



Section 2. INSTALLATION 2.1.



INTRODUCTION



2.1.1.



SAFETY PRECAUTIONS At every site, strict attention should be paid to safety regulations issued by the local authorities.



2.1.1.1.



General Rules ƒ To avoid accidents, the following safety rules should be observed. ƒ Do not consume alcohol in any form on the installation site. ƒ Anyone under the influence of alcohol will not be tolerated on the installation site. ƒ Wear protective goggles and safety gloves when working on batteries. Keep rinsing water, soda, and several cleaning cloths on hand. ƒ Wear sturdy shoes, safety gloves, and safety helmets. ƒ Remove protruding nails, strips, etc. immediately. ƒ Always check ladders and planks carefully before use. ƒ Do not tread on protruding plank sections. ƒ Never leave objects on scaffolding or ladders. ƒ Erect sturdy scaffolding and frames and always test them thoroughly before using them. ƒ Test and check electrical devices and extension cables before you use them. ƒ Remove fuses before working on the mains. ƒ Wear protective goggles when sanding or drilling. ƒ Sand off burr from chisels and punches. ƒ Test striking tools for tightness of fit. ƒ Do not put pointed or sharp objects into work clothing pockets. ƒ Remove jewelry such as chains and rings when working on building sites, especially when working with electrical devices. ƒ Always keep escape routes clear. ƒ Every employee on an installation site should know the following. ƒ Where the First Aid box is kept. ƒ The telephone number of the nearest casualty doctor and eye specialist.



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MARU 310/320 DME Technical Manual Volume I, Section 2



ƒ Where the fire extinguisher is kept. ƒ The location of hazardous areas on the way to the work place or at the work place itself. ƒ When the shelter (equipment room) is unoccupied, it should be locked.



2.2.



INSTALLATION ƒ To install the beacon, you must perform the following procedures. ƒ Select and prepare the site. ƒ Remove equipment from shipping containers. ƒ Make connections (typical installation), specifically, ground the equipment, connect the power supplies, connect the antenna, and make the input/output (I/O) connections ƒ Depending on the beacon configuration selected and the options used, it may be necessary to connect the facility to the associated equipment or to other equipment.



2.3.



INSTALLATION SITE SELECTION The location for the distance-measuring equipment (DME) installation is determined by the responsible Civil Aviation Authority according to international air traffic regulations. The selection of the DME location also depends on nearby obstacles and clearance and, when located in the terminal area, runway configuration; e.g., overrun, clearway, stopway. The following site selection guidelines are only general recommendations. The final site decision should be made locally, prior to, and during installation. The guidelines are computed with formulas that take into account the terrain, obstacles, and other unique considerations of the location. The installation location is determined by a surveyor-supervised site survey. Mopiens can provide an engineering consultant on site for this survey. The DME installation location depends on the following conditions: ƒ Terminal area beacon DME (substituting or enhancing MARKER functions) placed with instrument landing system (ILS) equipment Stand-alone DME with unidirectional antenna on its own mast and equipment installed into a suitable shelter. The area is dependent on clearance and runway configuration. ƒ En route beacon



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MARU 310/320 DME Technical Manual Volume I, Section 2



With or without associated very-high-frequency omnidirectional radio range (VOR) equipment (external zone site and normally far away from terminal area)



2.4.



EQUIPMENT SITE LOCATION The ground beacon may be installed in a control room or inside a shelter that complies with the environmental temperature, humidity, and etc. The equipment has the following overall dimensions. ƒ Height: 1922 mm ƒ Width: 600 mm ƒ Depth: 600 mm The equipment requires the following clearances. ƒ If rear access is required, there must be at least 24 inches between the rear part of the beacon and the wall and any piece of equipment. ƒ A minimum of 24 inches between the top of the beacon and the ceiling of the control room or the shelter to leave space for the external connection cables and to allow access to the antenna connector and to the antenna probes connectors. ƒ A minimum of 4 feet between the front of the beacon and the wall and any other piece of equipment to allow the operator to open the front door. The base must be able to support the total weight of the equipment--about 400 pounds (200 kilograms), including the optional modules, within the range of dynamic stress envisaged for the equipment. The beacon does not normally need securing; however, if it is to be secured to the base, use four M12 bolts.



2.5.



UNPACKING, PACKING, AND SHIPPING The equipment should be unpacked as soon as possible to ensure that it is complete and intact. If it is to be stored, the storage facility must be dry. Refer to section 4 for the appropriate temperature range specified in the technical data. The DME beacon and modules will be packed according to national and international standards. The packing procedure may vary according to shipping method and destination.



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MARU 310/320 DME Technical Manual Volume I, Section 2



2.6.



INSTALLATION CABLES



RF cable list) No.



Unit



Description



Concerning cable number



1



TXU / RXU



Local signal



R20, R21



2



Rack Top / MON



Antenna coupling signal



R10, R11



3



Rack Top / DPU



TX/RX Antenna Port(duplex)



R24



4



RFG / DPU



RFG output signal



R14, R15



st



5



RXU / DPU



RXU 1 received signal



R12, R13



6



TXU / LPA



TXU output signal



R18, R19



7



LPA / HPA



LPA output signal



R16, R17



8



HPA / DPU



HPA output signal



R22, R23



Page 2-4



MARU 310/320 DME Technical Manual Volume I, Section 2



2.6.1.



Rack Wiring Diagram ( RF Cable, rear view, including wiring number )



Page 2-5



MARU 310/320 DME Technical Manual Volume I, Section 2



2.6.2.



Detail wire description (RF cable)



2.6.2.1.



R10 cable (Top ANT. MON2 connect to RXU2)



2.6.2.2.



R11 cable (Top ANT. MON1 connect to RXU1)



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MARU 310/320 DME Technical Manual Volume I, Section 2



2.6.2.3.



R12 cable (RXU2 IN connect to DPU RX2)



2.6.2.4.



R13 cable (RXU1 IN connect to DPU RX1)



2.6.2.5.



R14 cable (RFG2 output connect to DPU INT2 )



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MARU 310/320 DME Technical Manual Volume I, Section 2



2.6.2.6.



R15 cable (RFG1 output connect to DPU INT1 )



2.6.2.7.



R16 cable (LPA2 OUT connect to HPA2 IN)



2.6.2.8.



R17 cable (LPA1 OUT connect to HPA1 IN)



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MARU 310/320 DME Technical Manual Volume I, Section 2



2.6.2.9.



R18 cable (TXU2 OUT connect to LPA2 IN )



2.6.2.10.



R19 cable (TXU1 OUT connect to LPA1 IN )



2.6.2.11.



R20 cable (TXU2 connect to RXU2)



Page 2-9



MARU 310/320 DME Technical Manual Volume I, Section 2



2.6.2.12.



R21 cable (TXU1 connect to RXU1)



2.6.2.13.



R22 cable (HPA2 OUT connect to DPU TX2)



2.6.2.14.



R23 cable (HPA1 OUT connect to DPU TX1)



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MARU 310/320 DME Technical Manual Volume I, Section 2



2.6.2.15.



R24 cable (Rack Antenna Port connect to DPU ANT.)



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MARU 310/320 DME Technical Manual Volume I, Section 2



2.6.3.



Rack Wiring Diagram ( Signal Cable, rear view, including wiring number )



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MARU 310/320 DME Technical Manual Volume I, Section 2



2.6.4.



Detail wire description(Signal cable)



2.6.4.1.



S100 cable



2.6.4.2.



S101 cable (AC input)



2.6.4.3.



S102 cable (Input DC Voltage : GND, Connect to Power Amplifier Backboard )



Page 2-13



MARU 310/320 DME Technical Manual Volume I, Section 2



2.6.4.4.



S103 cable (Input DC Voltage : GND, Connect to Power Amplifier Backboard )



2.6.4.5.



S104 cable (Main DC Voltage : GND)



2.6.4.6.



S105 cable (Main DC Voltage : +27V )



Page 2-14



MARU 310/320 DME Technical Manual Volume I, Section 2



2.6.4.7.



S106 cable (Battery1 Voltage : GND)



2.6.4.8.



S107 cable (Battery1 Voltage : +24V)



2.6.4.9.



S108 cable (Battery2 Voltage : GND)



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MARU 310/320 DME Technical Manual Volume I, Section 2



2.6.4.10.



S109 cable (Battery2 Voltage : +24V)



2.6.4.11.



S110 cable (Back board to Back board : Data & Power source)



2.6.4.12.



S111 cable (Back board to Back board : Data & Power source)



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MARU 310/320 DME Technical Manual Volume I, Section 2



2.6.4.13.



S112 cable (LCU / DPU signal connection)



2.6.4.14.



S113 cable (LCU signal connection)



2.6.4.15.



S114 cable (DPU signal connection)



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MARU 310/320 DME Technical Manual Volume I, Section 2



2.6.4.16.



S115 cable (Rack Top signal connection)



2.6.4.17.



S116 cable (Rack Top signal connection)



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MARU 310/320 DME Technical Manual Volume I, Section 2



2.6.5.



Caution (before wiring cables) WARNING Before connecting the cables, check that the mains lead is not connected to AC power and the battery leads are not powered. On the external electrical switchboard, the breaker used for the mains and battery must be OFF.



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MARU 310/320 DME Technical Manual Volume I, Section 2



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MARU 310/320 DISTANCE MEASURING EQUIPMENT



Technical Manual



VOLUME I SYSTEM DESCRIPTION, OPERATIONS AND MAINTENANCE



SECTION 3 OPERATION



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MARU 310/320 DME Technical Manual Volume I, Section 3



Contents Section 3. OPERATION ..................................................................................................................3-1 3.1. RMMS/LMMS ...................................................................................................... 3-1 3.1.1. RMMS/LMMS overview ................................................................................. 3-1 3.1.2. Software installation ...................................................................................... 3-2 3.1.3. Connecting to the System ............................................................................. 3-9 3.1.4. Log-in ........................................................................................................... 3-13 3.1.5. Main Window ............................................................................................... 3-15 3.1.5.1. Main Window description ................................................................................3-15 3.1.5.2. Menu Bar .........................................................................................................3-19 3.1.6. Transponder Window .................................................................................. 3-21 3.1.6.1. Transponder Window .......................................................................................3-21 3.1.6.2. Transponder Menu ...........................................................................................3-31 3.1.7. Monitor Window ........................................................................................... 3-33 3.1.7.1. Monitor Window..............................................................................................3-33 3.1.7.2. Monitor Test.....................................................................................................3-37 3.1.7.3. Monitor Menu ..................................................................................................3-37 3.1.8. System Window ........................................................................................... 3-38 3.1.8.1. System Window ...............................................................................................3-38 3.1.8.2. System Menu ...................................................................................................3-47 3.1.9. History Log Window .................................................................................... 3-48 3.1.9.1. History Log Window .......................................................................................3-48 3.1.9.2. RMMS/LMMS log ..........................................................................................3-50 3.1.9.3. MON values .....................................................................................................3-51 3.1.10. Program Menu............................................................................................. 3-52 3.1.10.1. File Menu.......................................................................................................3-52 3.1.10.2. Window Menu ...............................................................................................3-53 3.1.10.3. Calibration Menu ...........................................................................................3-54 3.1.10.4. Tools Menu ....................................................................................................3-55 3.2. CSP ................................................................................................................... 3-70 3.2.1. Appearance of CSP ..................................................................................... 3-70 3.2.1.1. Graphical LCD ................................................................................................3-70 3.2.1.2. Control & Mute buttons ...................................................................................3-70 3.2.1.3. TXP & MON Lamp .........................................................................................3-71 3.2.2. Main Screen ................................................................................................ 3-72 3.2.3. Using CSP ................................................................................................... 3-73 3.2.3.1. CSP Menu ........................................................................................................3-73 3.2.3.2. Message Box....................................................................................................3-75 3.2.3.3. Confirm Message .............................................................................................3-76 3.2.3.4. Setup Screen ....................................................................................................3-77 3.2.4. Bypass Menu ............................................................................................... 3-81 3.2.5. Quick Menu ................................................................................................. 3-82 3.2.6. Alarm ........................................................................................................... 3-83 3.2.6.1. Transponder 1 / 2 .............................................................................................3-85 Page i



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.6.2. Monitor 1 / 2 ....................................................................................................3-86 3.2.6.3. Presence Detect................................................................................................3-88 3.2.6.4. System .............................................................................................................3-90 3.2.6.5. Power Supply ...................................................................................................3-91 3.2.6.6. Environment ....................................................................................................3-92 3.2.7. Transponder ................................................................................................ 3-93 3.2.7.1. TXP1 / 2...........................................................................................................3-95 3.2.8. Monitor ....................................................................................................... 3-103 3.2.8.1. MON1 / 2 .......................................................................................................3-105 3.2.9. System....................................................................................................... 3-112 3.2.9.1. Save & Restore .............................................................................................. 3-114 3.2.9.2. System control ............................................................................................... 3-115 3.2.9.3. Changeover Mode.......................................................................................... 3-116 3.2.9.4. Changeover .................................................................................................... 3-117 3.2.9.5. Fan control .....................................................................................................3-120 3.2.9.6. DC/DC control ...............................................................................................3-124 3.2.9.7. Presence detect...............................................................................................3-125 3.2.9.8. Temperature ...................................................................................................3-126 3.2.9.9. Environment ..................................................................................................3-127 3.2.9.10. Audio ...........................................................................................................3-129 3.2.9.11. VOR Interface ..............................................................................................3-130 3.2.9.12. LCU Configuration ......................................................................................3-131 3.2.10. Power Supply ............................................................................................ 3-134 3.2.10.1. PSU Status ...................................................................................................3-135 3.2.10.2. PSU Measurement .......................................................................................3-136 3.2.11. Information................................................................................................. 3-137 3.2.11.1. DATE & TIME ............................................................................................3-139 3.2.11.2. LCU .............................................................................................................3-140 3.2.11.3. TCU 1 / 2 .....................................................................................................3-141 3.2.11.4. MON1 / 2 .....................................................................................................3-142 3.2.11.5. RMU 1 / 2 - LCU .........................................................................................3-143



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MARU 310/320 DME Technical Manual Volume I, Section 3



List of Tables Table 3-1 PC Specification for MARU 310/320 RMMS/LMMS SW installation ....................3-2 Table 3-2 Right Assignment by Authority Level .....................................................................3-14 Table 3-3 Unit state indicated. .................................................................................................3-18 Table 3-4 Operation Frequency group .....................................................................................3-23 Table 3-5 Frequency Control ...................................................................................................3-24 Table 3-6 Echo Suppression group ..........................................................................................3-25 Table 3-7 IDENT group ...........................................................................................................3-26 Table 3-8 Pulse Rate group ......................................................................................................3-28 Table 3-9 Print range ...............................................................................................................3-32 Table 3-10 Basic Monitor and Transponder status ..................................................................3-34 Table 3-11 Changeover Mode..................................................................................................3-43 Table 3-12 Log data format .....................................................................................................3-50 Table 3-13 Recorded log events ..............................................................................................3-50 Table 3-14 Recorded MON parameters ...................................................................................3-51 Table 3-15 Control & Mute buttons.........................................................................................3-70 Table 3-16 TXP Lamp .............................................................................................................3-71 Table 3-17 MON Lamp ...........................................................................................................3-71 Table 3-18 Displayed parameters at Main Screen ...................................................................3-72 Table 3-19 CSP Menu description ...........................................................................................3-74 Table 3-20 Message Box description .......................................................................................3-75 Table 3-21 Contents of Bypass Menu ......................................................................................3-81 Table 3-22 Contents of Quick Menu........................................................................................3-82 Table 3-23 Contents of Alarm..................................................................................................3-83 Table 3-24 Contents of Alarm > Transponder 1 / 2 .................................................................3-85 Table 3-25 Contents of Alarm > Monitor 1 / 2 ........................................................................3-86 Table 3-26 Contents of Alarm > Presence Detect ....................................................................3-88 Table 3-27 Contents of Alarm > System ..................................................................................3-90 Table 3-28 Contents of Alarm > Power Supply .......................................................................3-91 Table 3-29 Contents of Alarm > Environment.........................................................................3-92 Table 3-30 Contents of Transponder........................................................................................3-93 Table 3-31 Contents of Transponder > TXP1 / 2 .....................................................................3-95 Table 3-32 Contents of Transponder > TXP1 / 2 > Operation FREQ ......................................3-96 Table 3-33 Contents of Transponder > TXP1 / 2 > IDENT .....................................................3-97 Table 3-34 Contents of Transponder > TXP1 / 2 > Echo SUPP ..............................................3-98 Table 3-35 Contents of Transponder > TXP1 / 2 > Power.......................................................3-99 Table 3-36 Contents of Transponder > TXP1 / 2 > DC/DC...................................................3-100 Table 3-37 Contents of Transponder > TXP1 / 2 > SYS CONFIG ........................................3-101 Table 3-38 Contents of Transponder > TXP1 / 2 > Pulse rate ...............................................3-102 Table 3-39 Contents of Monitor ............................................................................................3-103 Table 3-40 Contents of Monitor > MON1 / 2 ........................................................................3-105 Table 3-42 Contents of Monitor > MON1 / 2 > Status ..........................................................3-106 Table 3-42 Contents of Monitor > MON1 / 2 > TXP1 / 2 Report .........................................3-109 Table 3-43 Contents of Monitor > MON1 / 2 > TXP1 / 2 Limits .......................................... 3-110 Page iii



MARU 310/320 DME Technical Manual Volume I, Section 3



Table 3-44 Contents of System .............................................................................................. 3-112 Table 3-45 Contents of System > Save & Restore................................................................. 3-114 Table 3-46 Contents of System > System control .................................................................. 3-115 Table 3-47 Contents of System > Changeover Mode ............................................................ 3-116 Table 3-48 Contents of System > Changeover ...................................................................... 3-117 Table 3-49 Contents of System > Changeover > MON1 / 2 CHOV rpt ................................ 3-118 Table 3-50 Contents of System > Changeover > Manual CHOV rpt .................................... 3-119 Table 3-51 Contents of System > Fan control .......................................................................3-120 Table 3-52 Contents of System > Fan control > Fan Status...................................................3-121 Table 3-53 Contents of System > Fan control > Config Manual Mode .................................3-122 Table 3-54 Contents of System > Fan control > Config Auto Mode .....................................3-123 Table 3-55 Contents of System > DC/DC control .................................................................3-124 Table 3-56 Contents of System > Temperature......................................................................3-126 Table 3-57 Contents of System > Environment .....................................................................3-127 Table 3-58 Contents of System > Environment > CONFIG Environment ............................3-128 Table 3-59 Contents of System > Audio ................................................................................3-129 Table 3-60 Contents of System > VOR Interface ..................................................................3-130 Table 3-61 Contents of System > LCU Configuration ..........................................................3-131 Table 3-62 Contents of System > LCU Configuration > CONFIG ETH Port .......................3-132 Table 3-63 Contents of System > LCU Configuration > Config COMM Port ......................3-133 Table 3-64 Contents of PSU ..................................................................................................3-134 Table 3-65 Contents of PSU > PSU Status ............................................................................3-135 Table 3-66 Contents of PSU > PSU Measurement ................................................................3-136 Table 3-67 Contents of Information.......................................................................................3-137 Table 3-68 Contents of Information > DATE & TIME .........................................................3-139 Table 3-69 Contents of Information > LCU ..........................................................................3-140 Table 3-70 Contents of Information > TCU1 / 2 ...................................................................3-141 Table 3-71 Contents of Information > MON1 / 2 ..................................................................3-142 Table 3-72 Contents of Information > RMU1 / 2-LCU .........................................................3-143



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MARU 310/320 DME Technical Manual Volume I, Section 3



List of Figures Figure 3-1 MARU 310/320 Software Installation Initiation ......................................................3-2 Figure 3-2 MARU 310/320 Setup Welcome Page .....................................................................3-3 Figure 3-3 MARU 310/320 Setup Rack Color Page .................................................................3-4 Figure 3-4 White rack and Green rack.......................................................................................3-4 Figure 3-5 MARU 310/320 Setup Components Page................................................................3-5 Figure 3-6 MARU 310/320 Setup Directory Page ....................................................................3-6 Figure 3-7 MARU 310/320 Installing Page...............................................................................3-7 Figure 3-8 MARU 310/320 Setup Finish Page ..........................................................................3-8 Figure 3-9 Connecting to MARU 310/320 system ....................................................................3-9 Figure 3-10 Connection setup..................................................................................................3-10 Figure 3-11 Adding Connection Type...................................................................................... 3-11 Figure 3-12 Log-in window .....................................................................................................3-13 Figure 3-13 Main Window ......................................................................................................3-15 Figure 3-14 Transponder status ...............................................................................................3-16 Figure 3-15 Monitor status ......................................................................................................3-16 Figure 3-16 Site Information ...................................................................................................3-17 Figure 3-17 Pulse Information .................................................................................................3-17 Figure 3-18 Unit state indicated ..............................................................................................3-18 Figure 3-19 DPU Status Indication ..........................................................................................3-19 Figure 3-20 Menu Bar .............................................................................................................3-19 Figure 3-21 Transponder Window ...........................................................................................3-21 Figure 3-22 Transponder status ...............................................................................................3-22 Figure 3-23 Changeover window ............................................................................................3-22 Figure 3-24 Operation Frequency group .................................................................................3-23 Figure 3-25 Frequency Control window..................................................................................3-24 Figure 3-26 Echo Suppression group ......................................................................................3-25 Figure 3-27 Echo Suppression Control window ......................................................................3-25 Figure 3-28 IDENT group .......................................................................................................3-26 Figure 3-29 IDENT Control window.......................................................................................3-26 Figure 3-30 Power Control group ............................................................................................3-27 Figure 3-31 Power Control window ........................................................................................3-27 Figure 3-32 Pulse Rate group ..................................................................................................3-28 Figure 3-33 Pulse Rate window...............................................................................................3-28 Figure 3-34 System Configuration group ................................................................................3-29 Figure 3-35 System Configuration window.............................................................................3-29 Figure 3-36 Transponder On/Off group ...................................................................................3-30 Figure 3-37 Transponder Control window...............................................................................3-30 Figure 3-38 Print Page .............................................................................................................3-31 Figure 3-39 Monitor Window ..................................................................................................3-33 Figure 3-40 Monitor and Transponder status ...........................................................................3-34 Figure 3-41 MON Operating Mode window ...........................................................................3-34 Figure 3-42 Measured value displayed ....................................................................................3-36 Figure 3-43 MON Alarm Limit window..................................................................................3-36 Page v



MARU 310/320 DME Technical Manual Volume I, Section 3



Figure 3-44 System Window ...................................................................................................3-38 Figure 3-45 System status........................................................................................................3-39 Figure 3-46 MON Mode group................................................................................................3-39 Figure 3-47 System Sound group ............................................................................................3-40 Figure 3-48 System Sound Control window............................................................................3-40 Figure 3-49 IDENT Sound group ............................................................................................3-41 Figure 3-50 IDENT Sound Control window ...........................................................................3-41 Figure 3-51 FAN Control group ..............................................................................................3-42 Figure 3-52 FAN Control window ...........................................................................................3-42 Figure 3-53 Changeover Mode group......................................................................................3-43 Figure 3-54 Changeover Mode Control window .....................................................................3-43 Figure 3-55 Changeover & Reset group ..................................................................................3-44 Figure 3-56 System Reset window ..........................................................................................3-44 Figure 3-57 System Information group ...................................................................................3-45 Figure 3-58 Shelter Environment group ..................................................................................3-46 Figure 3-59 History Log Window............................................................................................3-48 Figure 3-60 Program Menu .....................................................................................................3-52 Figure 3-61 File Menu .............................................................................................................3-52 Figure 3-62 Window Menu......................................................................................................3-53 Figure 3-63 Alarm Limit Window ...........................................................................................3-53 Figure 3-64 Calibration Menu .................................................................................................3-54 Figure 3-65 Tools Menu ..........................................................................................................3-55 Figure 3-66 Tools Menu - Monitor ..........................................................................................3-55 Figure 3-67 Main/Secondary Alarm window ..........................................................................3-56 Figure 3-68 MON Average window ........................................................................................3-57 Figure 3-69 Setting .csv file saving interval ............................................................................3-58 Figure 3-70 Tools Menu - Interrogation Signal .......................................................................3-59 Figure 3-71 Interrogation Frequency Control window ............................................................3-59 Figure 3-72 Interrogation PRF Control window......................................................................3-60 Figure 3-73 Sensitivity Test window .......................................................................................3-61 Figure 3-74 Interrogation Signal Pulse Space Control window ..............................................3-62 Figure 3-75 Interrogation Modulation Control window ..........................................................3-63 Figure 3-76 Tools Menu - Transponder ...................................................................................3-64 Figure 3-77 Tools Menu - System ...........................................................................................3-65 Figure 3-78 Tools Menu - Account Management ....................................................................3-66 Figure 3-79 Create Account window .......................................................................................3-66 Figure 3-80 Delete Account window .......................................................................................3-67 Figure 3-81 Change Password window ...................................................................................3-68 Figure 3-82 Alarm Popup ........................................................................................................3-69 Figure 3-83 Front of CSP ........................................................................................................3-70 Figure 3-84 Main Screen .........................................................................................................3-72 Figure 3-85 Main Menu...........................................................................................................3-73 Figure 3-86 Message Box ........................................................................................................3-75 Figure 3-87 Changeover Confirm Message .............................................................................3-76 Figure 3-88 String setup ..........................................................................................................3-77 Figure 3-89 Integer setup .........................................................................................................3-78 Page vi



MARU 310/320 DME Technical Manual Volume I, Section 3



Figure 3-90 Decimal Number setup ........................................................................................3-79 Figure 3-91 Selection setup .....................................................................................................3-80 Figure 3-92 Bypass Menu > ....................................................................................................3-81 Figure 3-93 Quick Menu > ......................................................................................................3-82 Figure 3-94 Alarm > ................................................................................................................3-83 Figure 3-95 Alarm menu map ..................................................................................................3-84 Figure 3-96 Alarm > Transponder 1 > .....................................................................................3-85 Figure 3-97 Alarm > Monitor 1 > ............................................................................................3-86 Figure 3-98 Alarm > Presence Detect > ..................................................................................3-88 Figure 3-99 Alarm > System > ................................................................................................3-90 Figure 3-100 Alarm > Power Supply >....................................................................................3-91 Figure 3-101 Alarm > Environment > .....................................................................................3-92 Figure 3-102 Transponder > ....................................................................................................3-93 Figure 3-103 Transponder menu map ......................................................................................3-94 Figure 3-104 Transponder > TXP1 >.......................................................................................3-95 Figure 3-105 Transponder > TXP1 > Operation FREQ > .......................................................3-96 Figure 3-106 Transponder > TXP1 > IDENT >.......................................................................3-97 Figure 3-107 Transponder > TXP1 > Echo SUPP > ................................................................3-98 Figure 3-108 Transponder > TXP1 > Power > ........................................................................3-99 Figure 3-109 Transponder > TXP1 > DC/DC > ....................................................................3-100 Figure 3-110 Transponder > TXP1 > SYS CONFIG > .........................................................3-101 Figure 3-111 Transponder > TXP1 > Pulse rate > .................................................................3-102 Figure 3-112 Monitor > .........................................................................................................3-103 Figure 3-113 Monitor menu map ...........................................................................................3-104 Figure 3-114 Monitor > MON1 > ..........................................................................................3-105 Figure 3-115 Monitor > MON1 > Status > ............................................................................3-106 Figure 3-116 Monitor > MON1 > IDENT Code....................................................................3-108 Figure 3-117 Monitor > MON1 > TXP1 Report > ................................................................3-109 Figure 3-118 Monitor > MON1 > TXP1 Limits > ................................................................. 3-110 Figure 3-119 System > .......................................................................................................... 3-112 Figure 3-120 System menu map ............................................................................................ 3-113 Figure 3-121 System > Save & Restore > ............................................................................. 3-114 Figure 3-122 System > System control > .............................................................................. 3-115 Figure 3-123 System > Changeover Mode ............................................................................ 3-116 Figure 3-124 System > Changeover > ................................................................................... 3-117 Figure 3-125 System > Changeover > MON1 CHOV rpt > .................................................. 3-118 Figure 3-126 System > Changeover > Manual CHOV rpt > ................................................. 3-119 Figure 3-127 System > Fan control > ....................................................................................3-120 Figure 3-128 System > Fan control > Fan Status > ...............................................................3-121 Figure 3-129 System > Fan control > Config Manual Mode > .............................................3-122 Figure 3-130 System > Fan control > Config Auto Mode > ..................................................3-123 Figure 3-131 System > DC/DC control .................................................................................3-124 Figure 3-132 System > Presence detect >..............................................................................3-125 Figure 3-133 System > Temperature > ..................................................................................3-126 Figure 3-134 System > Environment > .................................................................................3-127 Figure 3-135 System > Environment > CONFIG Environment > .........................................3-128 Page vii



MARU 310/320 DME Technical Manual Volume I, Section 3



Figure 3-136 System > Audio > ............................................................................................3-129 Figure 3-137 System > VOR Interface > ...............................................................................3-130 Figure 3-138 System > LCU Configuration > .......................................................................3-131 Figure 3-139 System > LCU Configuration > CONFIG ETH Port >....................................3-132 Figure 3-140 System > LCU Configuration > Config COMM Port >...................................3-133 Figure 3-141 PSU > ...............................................................................................................3-134 Figure 3-142 Power Supply menu map .................................................................................3-134 Figure 3-143 PSU > PSU Status >.........................................................................................3-135 Figure 3-144 PSU > PSU Measurement > .............................................................................3-136 Figure 3-145 Information > ...................................................................................................3-137 Figure 3-146 Information menu map .....................................................................................3-138 Figure 3-147 Information > DATE & TIME > ......................................................................3-139 Figure 3-148 Information > LCU > .......................................................................................3-140 Figure 3-149 Information > TCU1 > .....................................................................................3-141 Figure 3-150 Information > MON1 >....................................................................................3-142 Figure 3-151 Information > RMU1 -LCU >..........................................................................3-143



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MARU 310/320 DME Technical Manual Volume I, Section 3



Section 3. OPERATION 3.1.



RMMS/LMMS



3.1.1.



RMMS/LMMS overview



RMMS (Remote Maintenance Monitoring System) or LMMS (Local Maintenance Monitoring System) is a program that enables users to monitor or control MARU 310/320 system on PCs. RMMS/LMMS can be connected to LCU (Local Control Unit) by Ethernet, serial communication or using modem. RMMS/LMMS controls Transponders and reads and displays the values measured by Monitors. The information is of the same as what is displayed on CSP (Control Status Panel).



Representative status information which is displayed on RMMS/LMMS is as follows. ƒ ƒ ƒ ƒ ƒ



Status of each unit System configurations TXP configurations Main parameters of DME signal History log



Main functions of each window are as follows. ƒ Log-in Window: It is a user authentication window to control MARU 310/320 System. Only authenticated users can control the system by entering a user account and the correct password. Only monitoring the system is allowed for a level 1(not logged-in) user. ƒ Main Window: Main Window is designed to show main parameters of MARU 310/320 System. You can conveniently figure out fault status of units by checking the rack miniature. Units at alarm status are red, and removed units are displayed black. If you click a unit, it opens the unit window, or displays information on the unit. ƒ Transponder Window: You can change configurations of Transponders at Transponder Window. General settings and output power control are provided. ƒ Monitor Window: Parameters measured by MON unit are displayed and alarm ranges can be set up. ƒ System Window: You can change operating configurations of MARU 310/320 system. ƒ History log Window: While MARU 310/320 is operating, various events are recorded automatically as a log. The log data is saved not only in LCU but also in a local folder of a RMMS/LMMS PC. History Log Window displays log records saved in LCU, and inquiry can be made by date or in order of the latest record. ƒ System Window: It provides general control items required to operate the system as Changeover, System reset, Fan control and System sound.



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MARU 310/320 DME Technical Manual Volume I, Section 3



3.1.2.



Software installation



A PC should have following specifications to install MARU 310/320 RMMS/LMMS software.



Table 3-1 PC Specification for MARU 310/320 RMMS/LMMS SW installation Distinction



Specification



System



IBM Compatible PC : Desktop or Laptop



CPU



Intel Pentium 800MHz or Higher



Memory



Minimum 512MB RAM



HDD



Minimum 20GB (15GB free disk space)



Operating System



Microsoft Windows 2000/XP/Vista



RMMS/LMMS software is installed in accordance with following procedures.



1) Insert the RMMS/LMMS setup CD, and following Installation initiation window will appear. If the initiation window does not appear automatically, execute the setup file by double clicking.



Figure 3-1 MARU 310/320 Software Installation Initiation



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MARU 310/320 DME Technical Manual Volume I, Section 3



2)



Click [Next>] button at the Welcome page.



Figure 3-2 MARU 310/320 Setup Welcome Page



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MARU 310/320 DME Technical Manual Volume I, Section 3



3) The program can be installed by two different types of rack design. Check which you prefer to use, and click [Next>] button to move to the next step.



Figure 3-3 MARU 310/320 Setup Rack Color Page



Figure 3-4 White rack and Green rack



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MARU 310/320 DME Technical Manual Volume I, Section 3



4) At the Components page, you can choose components you want to install. Add or remove components by checking and un-checking. After choosing components, click [Next>] button.



Figure 3-5 MARU 310/320 Setup Components Page



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MARU 310/320 DME Technical Manual Volume I, Section 3



5) Choose the destination folder to install MARU 310/320. After modifying the directory, click [Install] button to start the installation. However, it is recommended not to change the default directory without any special reason.



Figure 3-6 MARU 310/320 Setup Directory Page



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MARU 310/320 DME Technical Manual Volume I, Section 3



6)



The program is now being installed with the previous settings.



Figure 3-7 MARU 310/320 Installing Page



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MARU 310/320 DME Technical Manual Volume I, Section 3



7) After installation of the program is completed, the following Finish page appears. Click [Finish] button to close the setup.



Figure 3-8 MARU 310/320 Setup Finish Page



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MARU 310/320 DME Technical Manual Volume I, Section 3



3.1.3.



Connecting to the System As the program is launched, it tries to make connection to MARU 310/320 System automatically with the last connection setting. The Main Window showing the main status of the system is displayed when connecting is successful.



Figure 3-9 Connecting to MARU 310/320 system



Setup… [Setup] button is used to change connection settings. After clicking [Setup], you need to choose a connection type from Connection list and modify details (port/baudrate/phone number/IP address). A new Setup is indispensable for the first connection.



ReConnect [ReConnect] button is used to try to connect to the system once more when previous trial was failed.



Cancel [Cancel] button is used to stop connecting.



Exit [Exit] button is used to cancel all activities and close the program.



The following figure is a window where communication is set up through the use of [Setup] button.



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MARU 310/320 DME Technical Manual Volume I, Section 3



Figure 3-10 Connection setup



Add… A new connection type is added to the present list, and details of the new type are to be determined.



Modify… Details of the selected connection type are modified. Name of the connection type cannot be changed.



Delete Selected connection type is removed from the list.



Connect The program tries to connect to MARU 310/320 system with the selected connection type and settings.



Clicking [Add…] button, a window creating a new connection type appears. Clicking [Modify…] opens a very similar window with ‘Add’, but the Name cannot be changed. To change the name of a connection type, delete the type at the list, and add a new one.



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MARU 310/320 DME Technical Manual Volume I, Section 3



Figure 3-11 Adding Connection Type



Name ‘Name’ is a given name of a connecting setting by which each connection type can be distinguished. History logs and MON values are automatically saved at ‘C:\MARU 310\\Log’ and ‘C:\MARU 310\\Mon’.



Port Ethernet: Select the port number to use. (49152~65535) RS-232, Dial-up, Leased line: Select the serial port. (COM1 ~ COM9)



Baudrate Select communication speed. (4800 ~ 115200 bps)



Site ‘Site’ is the place where the RMMS/LMMS pc is located. Select LMMS if the PC running the program is located inside the shelter. Otherwise, select RMMS.



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MARU 310/320 DME Technical Manual Volume I, Section 3



Type Choose the connection type. Ethernet and RS-232 are available both at LMMS and RMMS. Dial-up and Leased Line connection are to be used at RMMS sites.



Telephone number You need to input the destination telephone number when RMMS Dial-up is selected.



Modem Initialization command Enter a modem control command for the AT Command format. This is only for the test, and it is not recommended to be modified without any special reason.



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MARU 310/320 DME Technical Manual Volume I, Section 3



3.1.4.



Log-in



When the connection is successful, the Main Window opens. At the beginning, you have not logged in yet and are at Level 1 authority. Only monitoring of general system status and MON values are allowed to Level 1 user. To operate and control MARU 310/320 system, higher authority is needed. You need to click [LOGIN] button which is at the bottom of Menu Bar to log-in. An account is given Level 2 or Level 3 authority, and Level 3 user has given more ability than Level 2. The account information (authority level, ID, password) is saved in LCU unit, and each account can be either used at RMMS or at LMMS.



Figure 3-12 Log-in window



Authority level Functions of RMMS/LMMS are limited by each authority level. Level 1: Monitoring the general system status, TXP configurations, MON values and getting logs from LCU are allowed to Level 1 user. Level 2: All functions allowed to Level 1 are also allowed to Level 2. Additionally, Operating and controlling the system, modifying configurations and alarm limits, TXP and MON calibration, and MON TEST are allowed to Level 2 user. Level 3: All functions allowed to Level 2 are also allowed to Level 3. Additionally, it is possible to create and to delete user accounts.



Table 3-2 shows assigned functions for authority Level 1,2,3.



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MARU 310/320 DME Technical Manual Volume I, Section 3



Table 3-2 Right Assignment by Authority Level Section



Function



Level 1



Level 2



Level 3



Main Window



Monitoring Main status



○



○



○



Monitor Window



Monitoring MON values



○



○



○



MON mode control



×



○



○



MON alarm range setup



×



○



○



MON Test



×



○



○



Checking TXP Configurations



○



○



○



TXP control



×



○



○



Checking System information



○



○



○



System Reset



×



○



○



Alarm/ID sound control



×



○



○



Fan control



×



○



○



Get History Log



○



○



○



History Log backup



○



○



○



File Menu



Print



○



○



○



Window Menu



Window switching



○



○



○



Calibration Menu



TXP Calibration



×



○



○



MON Calibration



×



○



○



Creating new Account



×



×



○



Deleting Account



×



×



○



Changing Password



×



○



○



Changeover



×



○



○



TXP Shutdown



×



○



○



Setting MON Configurations



×



○



○



Transponder Window System Window



History Log Window



Tools Menu



etc.



Page 3-14



MARU 310/320 DME Technical Manual Volume I, Section 3



3.1.5.



Main Window The Main Window appears when RMMS/LMMS has successfully connected to MARU 310/320 system, at which the whole general status of the system can be grasped. DME rack miniature shows normalcy of modules, and state of each unit is indicated with pre-defined colors. The CSP lamps which show the state/mode of Transponders and Monitors are also graphically visualized.



3.1.5.1.



Main Window description



Figure 3-13 Main Window



Page 3-15



MARU 310/320 DME Technical Manual Volume I, Section 3



TXP operating information



Figure 3-14 Transponder status



State of TXP1 and TXP2 is indicated. TXP state is any of Main, Standby and Fault.



MON operating information



Figure 3-15 Monitor status



Alarm and operating mode status of MON1 and MON2 is indicated. MON state is any of Normal, Bypass, Alarm and Bypass+Alarm.



Page 3-16



MARU 310/320 DME Technical Manual Volume I, Section 3



Site information



Figure 3-16 Site Information



Operating Frequency Channel and IDENT code are displayed.



Pulse information



Figure 3-17 Pulse Information



Pulse information from MON is displayed.



Rack status information The rack miniature in Main Window looks just similar to the genuine MARU 310/320 System. Pre-defined colors indicate normalcy of modules, and you can see more information by clicking each module. Figure 3-18 shows examples of unit state indication.



Page 3-17



MARU 310/320 DME Technical Manual Volume I, Section 3



Figure 3-18 Unit state indicated



Table 3-3 Unit state indicated. State



Color



Normal



White (or Green)



Unplugged



Black



Bad



Red



Off



Dark Gray



Blank (HPA)



White (or Green)



Page 3-18



MARU 310/320 DME Technical Manual Volume I, Section 3



At DPU, main TXP LED is light on.



Figure 3-19 DPU Status Indication



3.1.5.2.



Menu Bar



Figure 3-20 Menu Bar



Menu Bar is on the left side of the program, which consists of 8 buttons.



Page 3-19



MARU 310/320 DME Technical Manual Volume I, Section 3



Window switching button Main, Transponser1, Transponder2, System and History Log are of this kind. Clicking a window switching button, it moves to the pertinent window.



Monitor button Clicking Monitor button, a Monitor Window which shows many MON values pops-up.



Login/Logout button You can log-in to or log-out from MARU 310/320 system to change the authority.



Page 3-20



MARU 310/320 DME Technical Manual Volume I, Section 3



3.1.6.



Transponder Window



3.1.6.1.



Transponder Window At Transponder Window, configurations of the Transponder can be modified. The mouse cursor changes hand-shaped on a controllable item, and you can click to modify values.



Figure 3-21 Transponder Window



Page 3-21



MARU 310/320 DME Technical Manual Volume I, Section 3



Transponder status



Figure 3-22 Transponder status



A Transponder is in state of Main, Standby or unplugged. Clicking the status display area, Changeover window pops up.



Figure 3-23 Changeover window



Page 3-22



MARU 310/320 DME Technical Manual Volume I, Section 3



Operation Frequency



Figure 3-24 Operation Frequency group



Displayed items are the Frequency Channel, current Operating Frequency and PLL status.



Table 3-4 Operation Frequency group Item



Contents



Remarks



Channel



1 ~ 126, X/Y



Frequency



962 ~ 1213



MHz



PLL Status



NORMAL



Blue



ALARM



Red



Clicking Operation Frequency group area, Frequency Control window pops up, where the Channel can be modified.



Page 3-23



MARU 310/320 DME Technical Manual Volume I, Section 3



Figure 3-25 Frequency Control window



As the Channel is tuned, Reply Frequency and Intg. Frequency changes automatically corresponding to the Channel. Clicking [Send] button, Frequency values are sent to TCUs and MONs simultaneously.



Table 3-5 Frequency Control Channel



Reply Frequency



Interrogation Frequency



1X ~ 63X



962 ~ 1024 MHz



1025 ~ 1087 MHz



64X ~ 126X



1151 ~ 1213 MHz



1088 ~ 1150 MHz



1Y ~ 63 Y



1088 ~ 1150 MHz



1025 ~ 1087 MHz



64Y ~ 126 Y



1025 ~ 1087 MHz



1088 ~ 1150 MHz



Page 3-24



MARU 310/320 DME Technical Manual Volume I, Section 3



Echo Suppression



Figure 3-26 Echo Suppression group



SDES(Short Distance Echo Suppression) and LDES(Long Distance Echo Suppression) are controlled.



Table 3-6 Echo Suppression group Item



Displayed Contents



Remarks



SDES



ON / OFF + Time



㎲



LDES Dead Time



ON / OFF + Time 60



㎲ ㎲



Clicking Echo Suppression group area, Echo Suppression Control window pops up, where SDES and LDES can be controlled.



Figure 3-27 Echo Suppression Control window



Page 3-25



MARU 310/320 DME Technical Manual Volume I, Section 3



IDENT



Figure 3-28 IDENT group



IDENT signal is controlled. Table 3-7 IDENT group Item



Displayed contents



Remarks



IDENT Code



Identifier



2~ 4 alphabetic letters



IDENT Mode



Independent



Blue



Associated, Master



Blue



Associated, Slave



Yellow



ON



Blue



OFF



Gray



IDENT Keying



Clicking IDENT group area, IDENT Control window pops up, where IDENT signal can be controlled.



Figure 3-29 IDENT Control window



Page 3-26



MARU 310/320 DME Technical Manual Volume I, Section 3



Power Control



Figure 3-30 Power Control group



Output power of the Transponder is displayed. Clicking Power Control group area, Power Control window pops up, where the output power can be modified.



Figure 3-31 Power Control window



Page 3-27



MARU 310/320 DME Technical Manual Volume I, Section 3



Pulse Rate



Figure 3-32 Pulse Rate group



Squitter Pulse Rate and Equalizer Pulse are controlled.



Table 3-8 Pulse Rate group Item



Displayed Contents



Squitter Pulse



ON / OFF + Pulse Rate



Equalizer Pulse



ON / OFF



Remarks pp/s



Clicking Squitter Pulse Rate group area, Pulse Rate window pops up, where Squitter Pulse and Equalizer Pulse can be controlled.



Figure 3-33 Pulse Rate window



Page 3-28



MARU 310/320 DME Technical Manual Volume I, Section 3



System Configuration



Figure 3-34 System Configuration group



System Delay of the Transponder is modified. Clicking the group area, a window pops up where System Delay can be modified.



Figure 3-35 System Configuration window



Page 3-29



MARU 310/320 DME Technical Manual Volume I, Section 3



Transponder On/Off



Figure 3-36 Transponder On/Off group



Transponder and RF Power can be turned On/Off. Clicking the group area, Transponder Control window pops up, where you can control RF power and Transponder units(TCU,TXU,RXU,LPA,HPA.)



Figure 3-37 Transponder Control window



Page 3-30



MARU 310/320 DME Technical Manual Volume I, Section 3



3.1.6.2.



Transponder Menu Right-clicking at Transponder Window, two items appear.



Write to EEPROM The present parameters are saved at LCU, TCU, MON EEPROM.



Print… Open Print page to print main status values and parameters of MARU 310/320.



Figure 3-38 Print Page



Page 3-31



MARU 310/320 DME Technical Manual Volume I, Section 3



Table 3-9 Print range Item Brief



Contents TXP Configuration



MON Measurement



Item TXP



MON



Details Status, Channel, IDENT Code, Output Power, System Delay, Dead Time, SDES, LDES, Squitter Pulse, Equalizer Pulse Major Status, IDENT Code, Output Power, System Delay, Reply Pulse Spacing, Reply Pulse Rise Time, Reply Pulse Decay Time, Reply Pulse Duration, Reply Efficiency, Reply Pulse Rate



Contents



Details



General Status Channel IDENT Output Power System Configuration Echo Suppression Pulse Rate DC/DC General Status TXP1 Measurement TXP2 Measurement



Alarm Limit



MON1



TXP1/2 System Delay, Pulse Spacing, Pulse Duration, Pulse Rise Time, Pulse Decay Time, Output Power, Efficiency, Pulse Rate, Frequency



MON2 System



Status Channel, Frequency IDENT Code, IDENT Mode, IDENT Keying Gaussian Pulse System Delay SDES, LDES, Dead Time Squitter Pulse, Equalizer Pulse DC/DC Status IDENT Code, Output Power, System Delay, Reply Pulse Spacing, Reply Pulse Rise Time, Reply Pulse Decay Time, Reply Pulse Duration, Reply Efficiency, Reply Pulse Rate



Changeover Configuration PSS Status



Alarm duration, Mode



System Temperature



Status, Voltage, Current of AC/DC, DC/DC, Battery LPA temperature, Ambient temperature



Page 3-32



MARU 310/320 DME Technical Manual Volume I, Section 3



3.1.7.



Monitor Window



3.1.7.1.



Monitor Window TXP Parameters measured by MON are displayed.



Figure 3-39 Monitor Window



Page 3-33



MARU 310/320 DME Technical Manual Volume I, Section 3



Monitor and Transponder status



Figure 3-40 Monitor and Transponder status



The present Monitor modes and TXP state are displayed. This information is also available at the Main Window.



Table 3-10 Basic Monitor and Transponder status Item MON1, MON2



TXP1, TXP2



Indication



Remarks



Normal



Blue



Bypassed



Yellow



Unplugged



Black



Active



Blue



Standby



Yellow



Clicking MON area, MON Operating Mode window pops up, where you can switch MON modes.



Figure 3-41 MON Operating Mode window



Page 3-34



MARU 310/320 DME Technical Manual Volume I, Section 3



Clicking TXP area, Changeover window pops up where the active TXP and standby TXP can be switched. This is exactly the same window as was in Transponder Window. (Fig. 3-23)



Page 3-35



MARU 310/320 DME Technical Manual Volume I, Section 3



Indication of measured values



A parameter measured by MON is indicated as a horizontal bar. The white indicator expresses the measured value visually relative to alarm limits. If the parameter exceeds the limit, the indicator is located in the red section, and the whole horizontal bar blinks in red.



Figure 3-42 Measured value displayed



A user with 2 or higher authority level can change MON alarm limits. Clicking a horizontal bar, pertinent alarm limit window pops up, where you can change limits.



Figure 3-43 MON Alarm Limit window



Page 3-36



MARU 310/320 DME Technical Manual Volume I, Section 3



3.1.7.2.



Monitor Test ‘Monitor alarm’ does not mean that the Monitor unit is working badly. Instead, there are several functions that can test MON normality at Monitor Window. Refer to ‘Maintenance and Repair Manual’ for more information.



3.1.7.3.



Monitor Menu Right-clicking at Monitor Window, two items appear.



Write to EEPROM The present parameters are saved at LCU, TCU, MON EEPROM.



Print… Open Print page to print main status values and parameters of MARU 310/320.



Page 3-37



MARU 310/320 DME Technical Manual Volume I, Section 3



3.1.8.



System Window



3.1.8.1.



System Window At System Window, operating configurations of the System can be modified. The mouse cursor changes hand-shaped on a controllable item, and you can click to modify values.



Figure 3-44 System Window



Page 3-38



MARU 310/320 DME Technical Manual Volume I, Section 3



System status



Figure 3-45 System status



Brief status of LCU and LCU’s system time is displayed.



MON Mode



Figure 3-46 MON Mode group



MON Operating mode is displayed. Clicking MON Mode group area, MON Operating Mode window pops up which is also available at Monitor Window.



Page 3-39



MARU 310/320 DME Technical Manual Volume I, Section 3



System Sound



Figure 3-47 System Sound group



System alarm sound On/Off is displayed. Clicking the group area, System Sound Control window pops up.



Figure 3-48 System Sound Control window



Page 3-40



MARU 310/320 DME Technical Manual Volume I, Section 3



IDENT Sound



Figure 3-49 IDENT Sound group



IDENT keying sound source is displayed. Clicking the group area, IDENT Sound Control window pops up, where the sound source can be selected.



Figure 3-50 IDENT Sound Control window



Page 3-41



MARU 310/320 DME Technical Manual Volume I, Section 3



FAN Control



Figure 3-51 FAN Control group



FAN operating mode is displayed, and can be controlled. Clicking the area, FAN Control window pops up. FAN may be in auto mode, or you can turn it on/off manually.



Figure 3-52 FAN Control window



Page 3-42



MARU 310/320 DME Technical Manual Volume I, Section 3



Changeover Mode



Figure 3-53 Changeover Mode group



If MON units are not in Bypass mode, continuous MON alarm automatically changeovers the system. Displayed items are Changeover Mode, Changeover Alarm Duration and Standby Mode. Standby Mode is also displayed on the left of bottom panel.



Table 3-11 Changeover Mode Item



Displayed Contents



Changeover Mode



AND/OR



Changeover Alarm Duration



1 sec ~



Standby Mode



HOT/COLD



Figure 3-54 Changeover Mode Control window



Page 3-43



Remarks



MARU 310/320 DME Technical Manual Volume I, Section 3



Changeover & Reset



Figure 3-55 Changeover & Reset group



You can open Changeover window or Reset window. At Reset window, you can restart software of digital units.(TCU, MON, LCU)



Figure 3-56 System Reset window



Page 3-44



MARU 310/320 DME Technical Manual Volume I, Section 3



System Information



Version information of LCU, TCU, MON is shown.



Figure 3-57 System Information group



Page 3-45



MARU 310/320 DME Technical Manual Volume I, Section 3



Shelter Environment



If fire/temperature/door sensor is installed, state of the shelter environment is shown as real time.



Figure 3-58 Shelter Environment group



Page 3-46



MARU 310/320 DME Technical Manual Volume I, Section 3



3.1.8.2.



System Menu Right-clicking at System Window, two items appear.



Write to EEPROM The present parameters are saved at LCU, TCU, MON EEPROM.



Print… Open Print page to print main status values and parameters of MARU 310/320.



Page 3-47



MARU 310/320 DME Technical Manual Volume I, Section 3



3.1.9.



History Log Window



3.1.9.1.



History Log Window LCU automatically saves various events data of MARU 310/320 system at a SD memory card. At History Log Window, you can get the log data from LCU SD card, and save it as a text file(*.log) on a local directory of RMMS/LMMS PC.



Figure 3-59 History Log Window



Get Log There are two ways RMMS/LMMS can get and arrange LCU logs: Recent records and Date. To get recent log records, check [Recent records] radio button, and input the number of records you want (1~500), and click [Get Log]. To get logs of a specified date, check [Date] radio button, and select the date you want, and click [Get Log] button. In either way, you need to wait a short time to get all the inquired logs.



Save as… The present displayed records on History Log Window is saved as a file(*.log) at the RMMS/LMMS PC.



Page 3-48



MARU 310/320 DME Technical Manual Volume I, Section 3



Load from File… Load a log file from the RMMS/LMMS PC, and display records.



Print… The present displayed records on History Log Window are printed.



Page 3-49



MARU 310/320 DME Technical Manual Volume I, Section 3



3.1.9.2.



RMMS/LMMS log During RMMS/LMMS is being connected to the system, it saves log records automatically



Log data format RMMS/LMMS log data format is of the same with LCU logs which are saved at PC. A log file can be loaded at any kind of text editor, and also can be loaded at Log History Window.



Table 3-12 Log data format Date Time Type yyyy-mmType of hh:mm:ss dd event



User Account name



Unit



Description



Unit name



Event description



RMMS/LMMS Log directory RMMS/LMMS logs are saved at the following directory.



Filename: yyyymmdd.log Ex: 2009011.log Save Directory: C:\MARU 310\\Log Ex: C:\MARU 310\RMMS_ETHERNET\Log



Recorded events Following events are recorded as a log:



Table 3-13 Recorded log events Type



Description



CONNECT



Connection to LCU



DISCONNECT



Program Finish



LOGIN



Log-in



LOGOUT



Log-out



ALARM



Alarm/Alarm clear



CONTROL



Setting values



Page 3-50



MARU 310/320 DME Technical Manual Volume I, Section 3



3.1.9.3.



MON values RMMS/LMMS also saves parameters measured by MON at regular intervals. The text file can be loaded at a text editor or a spread sheet.



Filename : MON#_yyyymmdd.csv. Ex: MON1_20090101.csv Save Directory : C:\MARU 310\\MON Ex: C:\MARU 310\RMMS_ETHERNET\ MON



Table 3-14 Recorded MON parameters TXP1



TXP2



etc.



Delay



Delay



RFG Spacing



Spacing



Spacing



RFG Duration



Duration



Duration



RFG Rising



Rising



Rising



RFG Decay



Decay



Decay



RFG Forward Power



Forward Power



Forward Power



RFG Frequency



Efficiency



Efficiency



IDENT



Pulse Rate



Pulse Rate



Active TXP



Frequency



Frequency



Changeover



You can change the time interval to save MON values at ‘MON .csv file saving interval’ of Tools Menu. (Refer to 3.1.10.4 Tools Menu)



Page 3-51



MARU 310/320 DME Technical Manual Volume I, Section 3



3.1.10.



Program Menu



Figure 3-60 Program Menu



Additional functions are available at Program Menu.



3.1.10.1.



File Menu



Figure 3-61 File Menu



Print… Open Print page to print main status values and parameters of MARU 310/320. This is exactly the same page as was in Transponder Menu, Monitor Menu and System Menu. (Fig. 3-38)



Print Setup… Open Print setup page.



Exit The program is closed.



Page 3-52



MARU 310/320 DME Technical Manual Volume I, Section 3



3.1.10.2.



Window Menu



Figure 3-62 Window Menu



Window Menu has very similar functions with Menu Bar. Clicking an item will guide you to the corresponding window. Additionally, Alarm Limit Window is available.



Figure 3-63 Alarm Limit Window



Page 3-53



MARU 310/320 DME Technical Manual Volume I, Section 3



3.1.10.3.



Calibration Menu



Figure 3-64 Calibration Menu



Configurations of MON and TXP are calibrated using measuring instruments. You should be very careful to use this function.



Monitor Calibration Output power and delay measured by MON are calibrated.



Transponder Calibration Power table and delay of TXP are calibrated.



Page 3-54



MARU 310/320 DME Technical Manual Volume I, Section 3



3.1.10.4.



Tools Menu



Figure 3-65 Tools Menu



Monitor >>



Figure 3-66 Tools Menu - Monitor



MON Operation Mode…



MON Operating Mode window pops up, where you can switch MON modes.



Page 3-55



MARU 310/320 DME Technical Manual Volume I, Section 3



Main/Secondary Alarm



Main and Secondary Alarm of MON values are redefined.



Figure 3-67 Main/Secondary Alarm window



Page 3-56



MARU 310/320 DME Technical Manual Volume I, Section 3



Average Number…



Number of measurements at MON to get an average value is modified.



Figure 3-68 MON Average window



Page 3-57



MARU 310/320 DME Technical Manual Volume I, Section 3



MON .csv file saving interval



Auto saving time of MON values is modified.



Figure 3-69 Setting .csv file saving interval



Page 3-58



MARU 310/320 DME Technical Manual Volume I, Section 3



Interrogation Signal >>



Figure 3-70 Tools Menu - Interrogation Signal



Interrogation Frequency…



Frequency of Interrogation signal is modified.



Figure 3-71 Interrogation Frequency Control window



Page 3-59



MARU 310/320 DME Technical Manual Volume I, Section 3



Interrogation PRF…



PRF of Interrogation signal is modified.



Figure 3-72 Interrogation PRF Control window



Page 3-60



MARU 310/320 DME Technical Manual Volume I, Section 3



Interrogation Sensitivity…



Interrogation Sensitivity is tested.



Figure 3-73 Sensitivity Test window



Page 3-61



MARU 310/320 DME Technical Manual Volume I, Section 3



Interrogation Pulse Space…



Pulse Spacing of Interrogation signal is modified.



Figure 3-74 Interrogation Signal Pulse Space Control window



Page 3-62



MARU 310/320 DME Technical Manual Volume I, Section 3



RFG Modulation…



RFG Modulation of Interrogation signal is controlled.



Figure 3-75 Interrogation Modulation Control window



Page 3-63



MARU 310/320 DME Technical Manual Volume I, Section 3



Transponder >>



Figure 3-76 Tools Menu - Transponder



Changeover… Changeover window is opened.



TXP1 Shutdown Transponder 1 is turned off.



TXP2 Shutdown Transponder 2 is turned off.



Page 3-64



MARU 310/320 DME Technical Manual Volume I, Section 3



System >>



Figure 3-77 Tools Menu - System



System Reset…



System Reset window is opened, where you can restart digital units.



Page 3-65



MARU 310/320 DME Technical Manual Volume I, Section 3



Account Management >>



Figure 3-78 Tools Menu - Account Management



Create Account



You can create a new account.



Figure 3-79 Create Account window



Page 3-66



MARU 310/320 DME Technical Manual Volume I, Section 3



Delete Account



You can delete existing accounts. ‘admin’ and ‘RCMU’ cannot be deleted.



Figure 3-80 Delete Account window



Page 3-67



MARU 310/320 DME Technical Manual Volume I, Section 3



Change Password



You can change the password of the account.



Figure 3-81 Change Password window



Page 3-68



MARU 310/320 DME Technical Manual Volume I, Section 3



Enable Alarm Sound



If checked, PC alarm sound is on..



Show Alarm Popup



If checked, alarm popup window is shown when any change of alarm status happens.



Figure 3-82 Alarm Popup



Page 3-69



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.



CSP CSP (Control Status Panel) provides an interface with which the operator can get the information of the system and control the system without external equipments.



3.2.1.



Appearance of CSP



CSP is composed of a graphical LCD, 7 buttons, and 12 LED lamps.



Figure 3-83 Front of CSP 3.2.1.1.



Graphical LCD You can monitor and control the system through Status LCD. At the first line of LCD, the present time, main TXP and control mode of the system is displayed all the time.



3.2.1.2.



Control & Mute buttons There are 6 Control buttons and a mute button at CSP.



Table 3-15 Control & Mute buttons Button



Function



MENU



Move to the basic screen/upper menu.



LOCAL



Control of the system is switched. (Local ↔ Remote)



CHOV



Run Changeover.



◀, ▶



Move to the left/right.



SET



Select a submenu/item.



MUTE



Mute the alarm sound.



Page 3-70



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.1.3.



TXP & MON Lamp 3 TXP lamps indicate the state of TXP1 and the other 3 TXP lamps are for TXP2. Likewise, 3 MON lamps indicate MON1 operating mode and the other 3 MON lamps are for MON2.



Table 3-16 TXP Lamp State



Color



Description



MAIN



GREEN



TXP is in Active state.



STDBY



ORANGE



TXP is in Standby state



FAULT



RED



TXP is shutdown, or an error has occurred.



Table 3-17 MON Lamp Mode



Color



Description



NORMAL



GREEN



MON is in Normal mode.



BYPASS



ORANGE



MON is in Bypass mode.



ALARM



RED



MON is in alarm.



Page 3-71



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.2.



Main Screen



Starting the system, CSP starts at Main Screen, where important parameters measured by MON1 and MON2 are displayed.



MARU 310



Reply Pulse Reply Pulse



2009-01-01 09:00:00 TX1 LOC



MON1 MON2 Efficiency 94.0% 91.5% Rate 899pp/s 868pp/s Delay 49.92us 49.64us Spacing 11.98us 11.98us To enter menu press MENU Figure 3-84 Main Screen



Table 3-18 Displayed parameters at Main Screen Item



Unit



Reply Efficiency



%



Pulse Rate



pp/s



Reply Delay



㎲



Pulse Spacing



㎲



Pulse Duration



㎲



Pulse Rise Time



㎲



Pulse Decay Time



㎲



Forward Peak Power



W



You should press [MENU] button to move to Main Menu.



Page 3-72



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.3.



Using CSP



3.2.3.1.



CSP Menu There are various submenus of CSP Menu, where you can monitor detail parameters and accurate status of the system, and control.



Figure 3-85 Main Menu



You can use (◀, ▶) buttons to change selection. To enter a submenu, press [SET] button. To step out from the submenu, press [MENU] button. You can move back to the Main screen by pressing [MENU] button at the Main Menu. Table 3-18 shows a brief description of submenus of the Main menu.



Page 3-73



MARU 310/320 DME Technical Manual Volume I, Section 3



Table 3-19 CSP Menu description Menu



Description



Bypass Menu



MON operating mode is controlled.



Quick Menu



Shortcuts to frequently used items can be created.



Alarm



You can monitor the whole information of alarm status of the system.



Transponder



Frequency and general signal configuration can be set up.



Monitor



Values measured by MON are displayed.



System



System configuration can be saved and recovered. Changeover, System reset, Fan control, Audio control, and installing environment sensor are available. Status and measured current/voltage values of Power Supply units are displayed. Date and time can be corrected. System information of digital units can be monitored..



Power Supply Information



Page 3-74



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.3.2.



Message Box While using CSP, a Message Box may appear to inform you about your action or about the system status.



Figure 3-86 Message Box



Important messages through Message Box are as follows.



Table 3-20 Message Box description Message



Description



Parameter value was applied



Parameter setting was successful.



Parameter value was saved



Parameter value was saved to EEPROM.



Parameter value was reloaded



Parameter value was reloaded from EEPROM.



Press during x sec do changeover Under control of REMOTE user



Time to keep pressing Changeover button to do changeover. Error when trying to control the System through CSP because control of the System is in REMOTE..



Communication failure occurred! TCU1 / 2 removed!



Communication error with TCU1, TCU2, MON1, MON2. Error when trying to access TXP menu because the TCU is not installed. Error when trying to access Monitor menu because the MON is not installed.



MON1 / 2 removed! System is shutdown state!



Error when trying to control TXP because it is shutdown.



Fail to apply



Parameter setting failed.



Page 3-75



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.3.3.



Confirm Message Most control actions need to be confirmed again, and CSP shows a Confirm Message.



Figure 3-87 Changeover Confirm Message



Use (◀, ▶) and [SET] buttons to confirm or to cancel the action.



Page 3-76



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.3.4.



Setup Screen String setup



At String setup screen, you should input characters one by one.



Figure 3-88 String setup



Actions for CSP buttons are as follows



◀, ▶



: Changing a character



MENU : Moving left. If the cursor is leftmost, it returns to the previous menu canceling the setup. SET



: Moving right. If the cursor is rightmost, setup is completed.



Page 3-77



MARU 310/320 DME Technical Manual Volume I, Section 3



Integer setup



At Integer setup screen, you can increase or decrease the value by 1.



Figure 3-89 Integer setup



Actions for CSP buttons are as follows



◀, ▶



: Decreasing/Increasing the value



MENU



: It returns to the previous menu canceling the setup.



SET



: Set up is completed.



Page 3-78



MARU 310/320 DME Technical Manual Volume I, Section 3



Decimal Number setup



At Decimal Number setup screen, you can increase or decrease each digit moving the cursor.



Figure 3-90 Decimal Number setup



Actions for CSP buttons are as follows



◀, ▶ : Decreasing/Increasing the value MENU : Moving left. If the cursor is leftmost, it returns to the previous menu canceling the setup. SET



: Moving right. If the cursor is rightmost, the set up is completed.



Page 3-79



MARU 310/320 DME Technical Manual Volume I, Section 3



Selection



At Selection setup screen, you should choose one of several available values.



Figure 3-91 Selection setup



Actions for CSP buttons are as follows



◀, ▶



: Changing the selection



MENU



: It returns to the previous menu canceling the setup.



SET



: The set up is completed.



Page 3-80



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.4.



Bypass Menu



You can change MON operating mode to Normal mode or Bypass mode.



Figure 3-92 Bypass Menu >



. Submenus of Bypass Menu are as follows



Table 3-21 Contents of Bypass Menu Submenu



Displayed contents



Description



MON1 Bypass



Active / Bypass



Change MON1 mode



MON2 Bypass



Active / Bypass



Change MON2 mode.



Page 3-81



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.5.



Quick Menu



You can create shortcuts(user quick menu) at Quick Menu for your convenience. A user quick menu can be instantly added or deleted.



Figure 3-93 Quick Menu >



Initial Quick menu is composed of Add Menu and Delete Menu. As a user quick menu is created, it is added to the list.



Table 3-22 Contents of Quick Menu Submenu



Description



Add Menu



Add a user quick menu



Delete Menu



Delete a user quick menu



Page 3-82



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.6.



Alarm



Alarm menu displays system alarm and BITE result of each unit.



Figure 3-94 Alarm >



Submenus of Alarm menu are as follows.



Table 3-23 Contents of Alarm Submenu Transponder 1/2



Monitor1 / 2



Presence Detect



Displayed t t NORMAL /OFF / ALARM / REMOVED / ---NORMAL / ALARM / REMOVED / ---NORMAL / ALARM



System



NORMAL / ALARM



Power Supply



NORMAL / ALARM



Environment



NORMAL / ALARM



Description PLL Status, LPA Status, HPA Status, DC/DC Status, RXU BITE, Power, Duration1, Durtaion2, Decay1, Deacay2, Rising1, Rising2, PulseLevel1, PulseLevel2, PRF, Spacing displayed. MON Sensitivity, TXP1 Measurement, TXP2 Measurement, RFG Measurement, IDENT code, Ant Delay, Space, PLL status and EXTROM status displayed. Installation status of each unit is displayed Automatic Shutdown status, TCU1/TCU2/MON1/MON2 communication status, EEPROM Status, LPA1/LPA2/HPA1/HPA2 Temperature, Fan condition and whether the space for Log Data is enough are displayed. AC supply condition, installation status and module condition of AC/DC1 / 2 and DC/DC1 / 2 and battery switch status are displayed. With sensors for temperature/fire/intrusion detection are set, information by each sensor is displayed.



Page 3-83



MARU 310/320 DME Technical Manual Volume I, Section 3



Figure 3-95 Alarm menu map



Page 3-84



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.6.1.



Transponder 1 / 2 Alarm status of Transponder 1 / 2 is displayed.



Figure 3-96 Alarm > Transponder 1 >



Table 3-24 Contents of Alarm > Transponder 1 / 2 Item



Displayed contents



Description



PLL Status



NORMAL / ALARM



PLL status



LPA Status



NORMAL / ALARM



LPA status



HPA Status



NORMAL / ALARM



HPA status



DC/DC Status



NORMAL / ALARM



DC/DC status



RXU BITE



NORMAL / ALARM



RXU BITE status



EEPROM



NORMAL / ALARM



EEPROM status



Page 3-85



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.6.2.



Monitor 1 / 2 Alarm status of Monitor 1 / 2 is displayed.



Figure 3-97 Alarm > Monitor 1 > Table 3-25 Contents of Alarm > Monitor 1 / 2 Item



Displayed contents



Description



MON Sensitivity



NORMAL / FAIL



MON status



TXP1 Delay



NORMAL / ALARM



TXP1 Delay status



TXP1 Space



NORMAL / ALARM



TXP1 Space status



TXP1 DUR



NORMAL / ALARM



TXP1 Duration status



TXP1 Rising



NORMAL / ALARM



TXP1 Rising status



TXP1 Decay



NORMAL / ALARM



TXP1 Decay status



TXP1 FWD PWR



NORMAL / ALARM



TXP1 Forward Power status



TXP1 EFFI



NORMAL / ALARM



TXP1 Efficiency status



TXP1 PP/S



NORMAL / ALARM



TXP1 PP/S status



TXP1 FREQ



NORMAL / ALARM



TXP1 Frequency status



TXP2 Delay



NORMAL / ALARM



TXP2 Delay status



TXP2 Space



NORMAL / ALARM



TXP2 Space status



TXP2 DUR



NORMAL / ALARM



TXP2 Duration status



TXP2 Rising



NORMAL / ALARM



TXP2 Rising status



TXP2 Decay



NORMAL / ALARM



TXP2 Decay status



TXP2 FWD PWR



NORMAL / ALARM



TXP2 Forward Power status



TXP2 EFFI



NORMAL / ALARM



TXP2 Efficiency status



TXP2 PP/S



NORMAL / ALARM



TXP2 PP/S status



TXP2 FREQ



NORMAL / ALARM



TXP2 Frequency status



IDENT Code



NORMAL / ALARM



IDENT Code status



RFG PLL



NORMAL / ALARM



RFG PLL status



Page 3-86



MARU 310/320 DME Technical Manual Volume I, Section 3



Item EEPROM



Displayed contents NORMAL / ALARM



Page 3-87



Description EEPROM status



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.6.3.



Presence Detect Installation status of the system is displayed.



Figure 3-98 Alarm > Presence Detect >



Table 3-26 Contents of Alarm > Presence Detect Item



Displayed contents



SD CARD



INSTALLED / REMOVED



FAN



INSTALLED / REMOVED



TX1 HPA



INSTALLED / REMOVED / NONE



TX1 LPA



INSTALLED / REMOVED



TX2 HPA



INSTALLED / REMOVED / NONE



TX2 LPA



INSTALLED / REMOVED



TCU1



INSTALLED / REMOVED



TCU2



INSTALLED / REMOVED



TXU1



INSTALLED / REMOVED



TXU2



INSTALLED / REMOVED



RXU1



INSTALLED / REMOVED



RXU2



INSTALLED / REMOVED



MON1



INSTALLED / REMOVED



MON2



INSTALLED / REMOVED



RFG1



INSTALLED / REMOVED



RFG2



INSTALLED / REMOVED



AC/DC1



INSTALLED / REMOVED



AC/DC2



INSTALLED / REMOVED



DC/DC1



INSTALLED / REMOVED



DC/DC2



INSTALLED / REMOVED



BAT1



INSTALLED / REMOVED



Page 3-88



MARU 310/320 DME Technical Manual Volume I, Section 3



Item BAT2



Displayed contents INSTALLED / REMOVED



Page 3-89



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.6.4.



System Alarm status of the entire system is displayed.



Figure 3-99 Alarm > System >



Table 3-27 Contents of Alarm > System Item



Displayed contents



Description



Automatic Shutdown



NORMAL /SHUTDOWN



Automatic Shutdown



CSP Operation



NORMAL /FAIL



CSP status



TCU1 Communication



TCU1 Comm status



MON1 Communication



NORMAL /OFF /FAIL / REMOVED NORMAL /OFF /FAIL / REMOVED NORMAL /FAIL /REMOVED



MON1 Comm status



MON2 Communication



NORMAL /FAIL /REMOVED



MON2 Comm status



LPA1 Temperature



LPA1 status



FAN



NORMAL /OFF / ALARM /REMOVED NORMAL /OFF / ALARM /REMOVED NORMAL /OFF / ALARM /REMOVED NORMAL /OFF / ALARM /REMOVED NORMAL /FAULT



Full Log Data



NORMAL /ALARM



SD card full



Automatic Shutdown



NORMAL /SHUTDOWN



Automatic Shutdown



TCU2 Communication



LPA2 Temperature HPA1 Temperature HPA2 Temperature



Page 3-90



TCU2 Comm status



LPA2 status HPA1 status HPA2 status FAN status



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.6.5.



Power Supply Alarm status of Power Supply units is displayed..



Figure 3-100 Alarm > Power Supply >



Table 3-28 Contents of Alarm > Power Supply Item



Displayed contents



Description



AC/DC1



NORMAL /FAULT /----



AC/DC1 status



AC/DC2



NORMAL /FAULT /----



AC/DC2 status



DC/DC1



NORMAL /FAULT



DC/DC1 status



DC/DC2



NORMAL /FAULT



DC/DC2 status



Battery1



NORMAL /FAULT



Battery1 status



Battery2



NORMAL /FAULT



Battery2 status



Page 3-91



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.6.6.



Environment Alarm status of the shelter environment is displayed. .



Figure 3-101 Alarm > Environment >



Table 3-29 Contents of Alarm > Environment Item



Displayed contents



Description



Shelter Door



OPENED /CLOSED /----



Door sensor



Fire Detect



NORMAL / FIRE! /----



Fire detecting sensor



Page 3-92



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.7.



Transponder



You can change Transponder configurations and control signal characteristics at Transponder menu.



Figure 3-102 Transponder >



Submenus of Transponder menu are as follows.



Table 3-30 Contents of Transponder Submenu



Description



TXP1



Control and monitoring Transponder 1



TXP2



Control and monitoring Transponder 2



Page 3-93



MARU 310/320 DME Technical Manual Volume I, Section 3



TXP1 Operation FREQ



Channel



IDENT



IDENT Code



IDENT Mode



Echo Supp



SDES Function



LDES Function



SDES Duration



LDES Duration



TXP2



Power



Gaussian



DC/DC



DC/DC



Sys Config



System Delay



Dead Time



Pulse rate



Squitter Function



Equalizer Function



Figure 3-103 Transponder menu map



Page 3-94



TX IDENT Keying



Squitter Pulse



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.7.1.



TXP1 / 2 You can control Transponder 1 at TXP1 menu, and control Transponder 2 at TXP2 menu.



Figure 3-104 Transponder > TXP1 >



Select a submenu you want, and press [SET] button.



Table 3-31 Contents of Transponder > TXP1 / 2 Submenu



Description



Operation FREQ



Frequency Channel setup



IDENT



IDENT setup



Echo SUPP



Echo suppression setup



Power



Power setup



DC/DC



DC/DC On/Off control



SYS CONFIG



System Delay setup



Pulse rate



Squitter Function, Equalizer Function, Squitter Pulse setup



Page 3-95



MARU 310/320 DME Technical Manual Volume I, Section 3



TXP1 / 2 > Operation FREQ



At this menu, Frequency Channel control is provided.



Figure 3-105 Transponder > TXP1 > Operation FREQ >



Press [SET] button to open a setup screen. Control of the system should be ‘LOCAL’.



Table 3-32 Contents of Transponder > TXP1 / 2 > Operation FREQ Item Channel



Displayed contents and setting range X /Y 1~126



Page 3-96



Description 962~1213 MHz



MARU 310/320 DME Technical Manual Volume I, Section 3



TXP1 / 2 > IDENT



At this menu, setup for IDENT Code, IDENT Mode and ID Keying is provided.



Figure 3-106 Transponder > TXP1 > IDENT >



Select you want to handle and press [SET] button to open a setup screen. Control of the system should be ‘LOCAL’.



Table 3-33 Contents of Transponder > TXP1 / 2 > IDENT Item



Setting range



Description



IDENT Code



XXX, XXXX



3 or 4 alphabetic letters



IDENT Mode



INDEPENDENT / Associated, MASTER / Associated, SLAVE / TEST / ON /OFF



Collocation mode



TX IDENT Keying



Page 3-97



MARU 310/320 DME Technical Manual Volume I, Section 3



TXP1 / 2 > Echo SUPP



At this menu, control of Short Distance Echo Suppression and Long Distance Echo Suppression is provided.



Figure 3-107 Transponder > TXP1 > Echo SUPP > Select you want to handle and press [SET] button to open a setup screen. Control of the system should be ‘LOCAL’.



Table 3-34 Contents of Transponder > TXP1 / 2 > Echo SUPP Item



Setting range



Description



SDES Function



ENABLE /DISABLE



SDES On/Off



LDES Function



ENABLE /DISABLE



LDES On/Off



SDES Duration



0.00 ~ 75.00 ㎲



SDES duration setup



LDES Duration



0.00 ~ 75.00 ㎲



LDES duration setup



Page 3-98



MARU 310/320 DME Technical Manual Volume I, Section 3



TXP1 / 2 > Power



At this menu, Gaussian pulse output setup is provided.



Figure 3-108 Transponder > TXP1 > Power >



Press [SET] button to open a setup screen. Control of the system should be ‘LOCAL’.



Table 3-35 Contents of Transponder > TXP1 / 2 > Power Item Gaussian



Setting range 0 ~ 120W (MARU 310) 0 ~ 1.2KW (MARU 320)



Page 3-99



Description Gaussian Output setup



MARU 310/320 DME Technical Manual Volume I, Section 3



TXP1 / 2 > DC/DC



At this menu, DC/DC ON/OFF control is provided.



Figure 3-109 Transponder > TXP1 > DC/DC >



Press [SET] button to open a setup screen. Control of the system should be ‘LOCAL’.



Table 3-36 Contents of Transponder > TXP1 / 2 > DC/DC Item DC/DC



Setting range ON /OFF



Page 3-100



Description DC/DC control



MARU 310/320 DME Technical Manual Volume I, Section 3



TXP1 / 2 > SYS CONFIG



At this menu, control of System Delay and Dead Time is provided.



Figure 3-110 Transponder > TXP1 > SYS CONFIG >



Select you want to handle and press [SET] button to open a setup screen. Control of the system should be ‘LOCAL’.



Table 3-37 Contents of Transponder > TXP1 / 2 > SYS CONFIG Item System Delay



Setting range 0.00 ~ 75.00 ㎲



System Delay setup



Dead Time



0.00 ~ 75.00 ㎲



Dead Time setup



Page 3-101



Description



MARU 310/320 DME Technical Manual Volume I, Section 3



TXP1 / 2 > Pulse rate



At this menu, control of Squitter Function, Equalizer Function and Squitter Pulse rate is provided.



Figure 3-111 Transponder > TXP1 > Pulse rate >



Select you want to handle and press [SET] button to open a setup screen. Control of the system should be ‘LOCAL’.



Table 3-38 Contents of Transponder > TXP1 / 2 > Pulse rate Item



Setting range



Description



Squitter Function



ON /OFF



Squitter Pulse On/Off



Equalizer Function



ON /OFF



Equalizer Pulse On/Off



Squitter Pulse



700 ~ 1500 pp/s



Pulse rate setup



Page 3-102



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.8.



Monitor



Monitor menu displays measured values by MON1/2 and provides setup for MON alarm limits.



Figure 3-112 Monitor >



Submenus of Monitor menu are as follows.



Table 3-39 Contents of Monitor Submenu



Description



MON1



Monitor 1 values displayed, MON limit setup



MON2



Monitor 2 values displayed, MON limit setup



Page 3-103



MARU 310/320 DME Technical Manual Volume I, Section 3



Figure 3-113 Monitor menu map



Page 3-104



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.8.1.



MON1 / 2 You can monitor measured values and change alarm limits of Monitor 1 at MON1 and Monitor 2 at MON2.



Figure 3-114 Monitor > MON1 >



Submenus of Monitor menu are as follows.



Table 3-40 Contents of Monitor > MON1 / 2 Submenu



Description



Status



Status of measured values



IDENT Code



Decoded IDENT Code displayed



TXP1 Report



TXP1 values displayed



TXP2 Report



TXP2 values displayed



TXP1 Limits



MON Alarm limits of TXP1



TXP2 Limits



MON Alarm limits of TXP2



Page 3-105



MARU 310/320 DME Technical Manual Volume I, Section 3



MON1 / 2 > Status



At this menu, alarm status information of MON1 / 2 can be monitored.



Figure 3-115 Monitor > MON1 > Status >



Table 3-41 Contents of Monitor > MON1 / 2 > Status Item



Displayed contents



Description



MON Sensitivity



NORMAL / FAIL



MON Sensitivity status



TXP1 Delay



NORMAL / ALARM



TXP1 Delay status



TXP2 Delay



NORMAL / ALARM



TXP2 Delay status



TXP1 Space



NORMAL / ALARM



TXP1 Space status



TXP2 Space



NORMAL / ALARM



TXP2 Space status



TXP1 Durat



NORMAL / ALARM



TXP1 Duration status



TXP2 Durat



NORMAL / ALARM



TXP2 Duration status



TXP1 Rising



NORMAL / ALARM



TXP1 Rising status



TXP2 Rising



NORMAL / ALARM



TXP2 Rising status



TXP1 Decay



NORMAL / ALARM



TXP1 Decay status



TXP2 Decay



NORMAL / ALARM



TXP2 Decay status



TXP1 Fwd Pwr



NORMAL / ALARM



TXP1 Forward Power status



TXP2 Fwd Pwr



NORMAL / ALARM



TXP2 Forward Power status



TXP1 EFFI



NORMAL / ALARM



TXP1 Efficiency status



TXP2 EFFI



NORMAL / ALARM



TXP2 Efficiency status



TXP1 PP/S



NORMAL / ALARM



TXP1 PP/S status



TXP2 PP/S



NORMAL / ALARM



TXP2 PP/S status



TXP1 FREQ



NORMAL / ALARM



TXP1 Frequency status



TXP2 FREQ



NORMAL / ALARM



TXP2 Frequency status



IDENT Code



NORMAL / ALARM



IDENT Code status



Page 3-106



MARU 310/320 DME Technical Manual Volume I, Section 3



Item



Displayed contents



Description



RFG PLL



NORMAL / ALARM



RFG PLL status



EEPROM



NORMAL / ALARM



EEPROM status



Page 3-107



MARU 310/320 DME Technical Manual Volume I, Section 3



MON1 / 2 > IDENT Code



IDENT Code measured by MON1 / 2 is displayed.



Figure 3-116 Monitor > MON1 > IDENT Code



Page 3-108



MARU 310/320 DME Technical Manual Volume I, Section 3



MON1 / 2 > TXP1 / 2 Report



At this menu, monitoring TXP1 / 2 values measured by MON1 / 2 is provided.



Figure 3-117 Monitor > MON1 > TXP1 Report >



Table 3-42 Contents of Monitor > MON1 / 2 > TXP1 / 2 Report Item



Unit



Description



Reply Delay



㎲



Reply Delay



Pulse Spacing



㎲



Reply Pulse Spacing



Pulse Duration



㎲



Reply Pulse Duration



Pulse Rise Time



㎲



Reply Pulse Rise Time



Pulse Decay Time



㎲



Reply Pulse Decay Time



FWD Peak Power



W



Forward Peak Power



Reply Efficiency



%



Reply Efficiency



Reply Rate



pp/s



Reply Pulse rate



Frequency



MHz



Frequency of Reply signal



Page 3-109



MARU 310/320 DME Technical Manual Volume I, Section 3



MON1 / 2 > TXP1 / 2 Limits



At this menu, changing TXP1 / 2 alarm limits is provided



Figure 3-118 Monitor > MON1 > TXP1 Limits >



Select you want to change, and press [SET] button to open a setup screen. Control of the system should be ‘LOCAL’. Table 3-43 Contents of Monitor > MON1 / 2 > TXP1 / 2 Limits Item



Displayed contents and



Description



Reply Delay UP



0 ~ 100 ㎲



Reply Pulse Delay upper limit



Reply Delay LO



0 ~ 100 ㎲



Reply Pulse Delay lower limit



Pulse SPC UP



0 ~ 100 ㎲



Reply Pulse Pair Spacing upper limit



Pulse SPC LO



0 ~ 100 ㎲



Reply Pulse Pair Spacing lower limit



Pulse DUR UP



0 ~ 10 ㎲



Reply Pulse Duration upper limit



Pulse DUR LO



0 ~ 10 ㎲



Reply Pulse Duration lower limit



Pulse Rise UP



0 ~ 10 ㎲



Reply Pulse Rise upper limit



Pulse Rise LO



0 ~ 10 ㎲



Reply Pulse Rise lower limit



Pulse Decay UP



0 ~ 10 ㎲



Reply Pulse Decay upper limit



Pulse Decay LO



0 ~ 10 ㎲



Reply Pulse Decay lower limit



FWD Power UP



0 ~ 1000 W



Reply Pulse Forward Peak Power upper limit



FWD Power LO



0 ~ 1000 W



Reply Pulse Forward Peak Power lower limit



Reply EFFI UP



0 ~ 100 %



Reply Efficiency upper limit



Reply EFFI LO



0 ~ 100 %



Reply Efficiency lower limit



Reply Rate UP



0 ~ 8000 pp/s



Reply Pulse rate upper limit



Reply Rate LO



0 ~ 8000 pp/s



Reply Pulse rate lower limit



Frequency UP



9000.0000 ~ 1270.0000 MHz



Frequency upper limit



Page 3-110



MARU 310/320 DME Technical Manual Volume I, Section 3



Item Frequency LO



Displayed contents and 9000.0000 ~ 1270.0000 MHz



Page 3-111



Description Transponder Frequency lower limit



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.9.



System



You can modify more system configurations and control the system at System menu. All the controls at CSP menu can be saved to EEPROM, and can be restored at System menu.



Figure 3-119 System >



Submenus of System menu are as follows.



Table 3-44 Contents of System Submenu



Description



Save & Restore



Parameters are saved or restored.



System Control Changeover Mode



Control of the system, TX On/Off, reset, Auto log-out time , Auto control change time, HOT/COLD Standby control Changeover Alarm time setup, MON operation mode setup



Changeover



Changeover related setup



Fan control



Fan control



DC/DC control



DC/DC On/Off control



Presence detect



Unit installation status



Temperature



System temperature display



Environment



Shelter Environment status



Audio



Audio setup



VOR Interface



VOR interface setup



LCU Configuration



LCU operating configurations setup



Page 3-112



MARU 310/320 DME Technical Manual Volume I, Section 3



System



Save & Restore



Save & Restore LCU



Save & Restore TCU1



Save & Restore TCU2



Save & Restore MON1



HOT/COLD Select



Save & Restore MON2 System Control



Changeover Mode



Changeover



FAN Control



LOCAL/REMO TE select



TX1 ON/OFF Select



TX2 ON/OFF Select



Clear Shutdown State



AUTO Change Time



Changeover Time



CHOV Alarm Time



Operation Mode



RUN Chageover



MON1 CHOV rpt



MON2 CHOV rpt



Manual CHOV rpt



System reset



FAN status FAN auto/manual select Config Manual Mode Config Auto Mode



FAN ON Temperature



DC/DC control



DC/DC1



DC/DC2



Presence Detect



SD CARD



FAN



TX1 HPA



RFG1



TX1 LPA



TX2 HPA



TX2 LPA



RFG2



TCU1



TCU2



TXU1



TXU2



RXU1



RXU2



MON1



MON2



AC/DC1



AC/DC2



DC/DC1



DC/DC2



BAT1



BAT2



Temperature



System Overheat



TEMP SHDN On/Off



Environment



Shelter TEMP



Shelter door



Audio



ID Sound



System Sound



VOR Interface



Operation Line



IDENT Line



LCU Configuration



Config ETH Port



Config COMM Port



Figure 3-120 System menu map



Page 3-113



TX1 HPA



TX1 LPA



TX2 HPA



TX2 LPA



Fire detect



Config Envirnment



LAMP Test



Clear CSP



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.9.1.



Save & Restore At this menu, saving or restoring parameters of each unit is provided. You cannot save or restore parameters of an unplugged unit.



Figure 3-121 System > Save & Restore >



Select unit you want to handle and press [SET] button to open a setup screen. Control of the system should be ‘LOCAL’.



Table 3-45 Contents of System > Save & Restore Item



Setting range



Description



Save & Restore LCU



NO OPERATION/SAVE/RELOAD



Save & Restore TCU1



NO OPERATION/SAVE/RELOAD



Save & Restore TCU2



NO OPERATION/SAVE/RELOAD



Save & Restore MON1



NO OPERATION/SAVE/RELOAD



Save & Restore MON2



NO OPERATION/SAVE/RELOAD



Reading or writing LCU EEPROM Reading or writing TCU1 EEPROM Reading or writing TCU2 EEPROM Reading or writing MON 1 EEPROM Reading or writing MON2 EEPROM



Page 3-114



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.9.2.



System control At this menu, various controls of the system are provided.



Figure 3-122 System > System control >



Select you want to do, and press [SET] button to open a setup screen.



Table 3-46 Contents of System > System control Item



Displayed contents and setting range



Description



LOCAL/REMOTE select



LOCAL /REMOTE



Control of the System is selected



TX1 On/Off select



ON /OFF



TX1 On/Off control



TX2 On/Off select



ON /OFF



TX2 On/Off control



HOT/COLD select



HOT /COLD



HOT/COLD select



Clear Shutdown State



Shutdown clear



AUTO Change Time



1 ~ 600 min



AUTO Log-out Time



1 ~ 600 min



Changeover Time



At once ~ 3sec



System Reset



LOC Æ REM auto change time Auto Log-out time of RMMS/LMMS Changeover by Changeover button Restarting the System



Page 3-115



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.9.3.



Changeover Mode At this menu, auto changeover time and auto changeover mode can be controlled.



Figure 3-123 System > Changeover Mode



Select you want to handle and press [SET] button to open a setup screen. Control of the system should be ‘LOCAL’.



Table 3-47 Contents of System > Changeover Mode Item CHOV Alarm Time Operation Mode



Setting range 1 ~ 60 sec AND / OR Mode



Page 3-116



Description Alarm duration for automatic Changeover Changeover AND / OR Mode



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.9.4.



Changeover At this menu, Changeover and Changeover reports are provided..



Figure 3-124 System > Changeover >



Select you want to do, and press [SET] button. To run Changeover, control of the system should be ‘LOCAL’.



Table 3-48 Contents of System > Changeover Submenu



Displayed contents



RUN Changeover MON1 CHOV rpt MON2 CHOV rpt Manual CHOV rpt



Description Changeover TXP



PREPARED / NO DATA / ----



Information of previous automatic Changeover by MON1



PREPARED / NO DATA / ---PREPARED / NO DATA / ----



Information of previous automatic Changeover by MON2 Information of previous manual Changeover



Page 3-117



MARU 310/320 DME Technical Manual Volume I, Section 3



Changeover > MON1 / 2 CHOV rpt



At this menu, recorded information about automatic Changeover by MON1 / 2 is displayed. If no automatic Changeover occurred, parameters are indicated as ‘----’.



Figure 3-125 System > Changeover > MON1 CHOV rpt >



Table 3-49 Contents of System > Changeover > MON1 / 2 CHOV rpt Item Changeover Status



Displayed contents TX1->TX2 / TX2->TX1



Description Changeover direction



Changeover Date



Date when Changeover occurred



Changeover Time



Time when Changeover occurred



TXP1 Shutdown Status



NORMAL / SHUTDOWN



TXP1 Shutdown status



TXP2 Shutdown Status



NORMAL / SHUTDOWN



TXP2 Shutdown status



Reply Delay Error



OCCURRED / none



Reply Delay status



Pulse Spacing Error



OCCURRED / none



Pulse Spacing status



FWD Power Error



OCCURRED / none



FWD Power status



Frequency Error



OCCURRED / none



Frequency status



Pulse Rate Error



OCCURRED / none



Pulse Rate status



IDENT Code Error



OCCURRED / none



IDENT Code status



Page 3-118



MARU 310/320 DME Technical Manual Volume I, Section 3



Changeover > Manual CHOV rpt



At this menu, recorded information about manual is displayed. If no manual Changeover occurred, parameters are indicated as ‘----’.



Figure 3-126 System > Changeover > Manual CHOV rpt >



Table 3-50 Contents of System > Changeover > Manual CHOV rpt Item Changeover Status



Displayed contents TX1->TX2 / TX2->TX1



Description Changeover direction



Changeover Date



Date when Changeover occurred



Changeover Time



Time when Changeover occurred



Control Type User Information



LOCAL / REMOTE1 / REMOTE2 / CSP KeyPad / Viewer / ACCOUNT NAME



Page 3-119



Control Type indication User information



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.9.5.



Fan control At this menu, it is available to monitor Fan Status and control the Fan.



Figure 3-127 System > Fan control >



Select you want to do, and press [SET] button. To change Fan mode or configurations, control of the system should be ‘LOCAL’.



Table 3-51 Contents of System > Fan control Item



Displayed contents and setting range



Description



Fan Status



NORMAL / ALARM



Fan operating status



Fan Auto/Manual Select



AUTO / MANUAL



Fan mode control



Config Manual Mode



ON / OFF



Fan On/Off control



Config Auto Mode



-55 ~ 125°C



Fan Operating temperature setup



Page 3-120



MARU 310/320 DME Technical Manual Volume I, Section 3



Fan control > Fan Status



At this menu, Fan Alarm status and Fan Operating status can be monitored.



Figure 3-128 System > Fan control > Fan Status >



Table 3-52 Contents of System > Fan control > Fan Status Item



Displayed contents



Description



Fan Alarm



NORMAL / ALARM



Fan alarm



Fan Status



ON / OFF



Fan operating status



Page 3-121



MARU 310/320 DME Technical Manual Volume I, Section 3



Fan control > Config Manual Mode



At this menu, Fan operating control is provided.



Figure 3-129 System > Fan control > Config Manual Mode >



Press [SET] button to open a setup screen. Control of the system should be ‘LOCAL’.



Table 3-53 Contents of System > Fan control > Config Manual Mode Item Fan On/Off



Displayed contents and setting range ON / OFF



Page 3-122



Description Fan operating control



MARU 310/320 DME Technical Manual Volume I, Section 3



Fan control > Config Auto Mode



At this menu, control of Auto Fan operation temperature is provided.



Figure 3-130 System > Fan control > Config Auto Mode >



Press [SET] button to open a setup screen. Control of the system should be ‘LOCAL’.



Table 3-54 Contents of System > Fan control > Config Auto Mode Item



Fan Operation TEMP



Displayed contents and setting range -55.0 ~ 125.0 ℃



Page 3-123



Description Fan operating temperature setup



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.9.6.



DC/DC control At this menu, On/Off control of DC/DC is provided.



Figure 3-131 System > DC/DC control



Select you want to handle and press [SET] button to open a setup screen. Control of the system should be ‘LOCAL’.



Table 3-55 Contents of System > DC/DC control Item



Displayed contents and setting range



Description



DC/DC1



ON / OFF



DC/DC1 operation



DC/DC2



ON / OFF



DC/DC2 operation



Page 3-124



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.9.7.



Presence detect At this menu, information of unit installation is provided.



Figure 3-132 System > Presence detect >



As contents of “System > Presence detect” is identical to that of “Alarm > Presence detect”, refer to Table 3-26.



Page 3-125



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.9.8.



Temperature At this menu, you can monitor HPA and LPA temperature and control overheat shutdown configurations.



Figure 3-133 System > Temperature >



Select you want to handle and press [SET] button to open a setup screen. To change overheat configurations, control of the system should be ‘LOCAL’.



Table 3-56 Contents of System > Temperature Item



Displayed contents and setting range



Description



System Overheat



-55.0 ~ 125.0 ℃



Overheat temperature setup



TEMP SHDN ON/OFF



ON / OFF



Auto shutdown On/Off



TX1 HPA



-55.0 ~ 125.0 ℃ /OFF / FAIL /REMOVED /NONE



TX1 HPA temperature



TX1 LPA



-55.0 ~ 125.0 ℃ /OFF / FAIL /REMOVED



TX1 LPA temperature



TX2 HPA



-55.0 ~ 125.0 ℃ /OFF / FAIL /REMOVED /NONE



TX2 HPA temperature



TX2 LPA



-55.0 ~ 125.0 ℃ /OFF / FAIL /REMOVED



TX2 LPA temperature



Page 3-126



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.9.9.



Environment At this menu, you can monitor shelter status and setup sensor installation.



Figure 3-134 System > Environment >



To setup sensor installation, select CONFIG Environment, and press [SET] button.



Table 3-57 Contents of System > Environment Submenu



Displayed contents



Description



Shelter TEMP



-55.0 ~ 125.0 ℃ / ----



Shelter temperature



Shelter Door



OPENED / CLOSED / ----



Shelter door status



Fire Detect



NORMAL / FIRE! / ----



Shelter fire detection



CONFIG Environment



Sensor installation setup



Page 3-127



MARU 310/320 DME Technical Manual Volume I, Section 3



Environment > CONFIG Environment



At this menu, sensor installation setup is provided.



Figure 3-135 System > Environment > CONFIG Environment >



Select you want to handle and press [SET] button to open a setup screen. Control of the system should be ‘LOCAL’.



Table 3-58 Contents of System > Environment > CONFIG Environment Item



Displayed contents and setting range



Description



TEMP Sensor



NONE / INSTALLED



Temperature sensor installation setup



Door Sensor



NONE / INSTALLED



Door sensor installation setup



Fire Sensor



NONE / INSTALLED



Fire sensor installation setup



Page 3-128



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.9.10.



Audio At this menu, system alarm sound and IDENT sound can be turned on / off.



Figure 3-136 System > Audio >



Select you want to handle and press [SET] button to open a setup screen. Control of the system should be ‘LOCAL’.



Table 3-59 Contents of System > Audio Item ID Sound



System Sound



Displayed contents and setting range FROM TCU1 / FROM TCU2 / FROM MON1 / FROM MON2 / FROM ACTIVE TCU / OFF ON / OFF



Page 3-129



Description ID sound source selection



System alarm sound On/Off



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.9.11.



VOR Interface At this menu, Interface setup is provided if the system is collocated with VOR.



Figure 3-137 System > VOR Interface >



Select you want to setup, and press [SET] button to open a setup screen. Control of the system should be ‘LOCAL’.



Table 3-60 Contents of System > VOR Interface Item



Displayed contents and setting range



Description



Operation Line



SOURCE / SINK



Operation Line setup



IDENT Line



SOURCE / SINK



IDENT Line setup



Page 3-130



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.9.12.



LCU Configuration At this menu, set up for communication configurations and CSP lamp test are provided.



Figure 3-138 System > LCU Configuration >



Select you want to handle and press [SET] button to open a submenu.



Table 3-61 Contents of System > LCU Configuration Submenu



Description



CONFIG ETH Port



LCU Ethernet address setup



CONFIG COMM Port



LCU communication type setup



Lamp Test



Run Lamp Test



Clear CSP



Clear CSP Screen



Page 3-131



MARU 310/320 DME Technical Manual Volume I, Section 3



LCU Configuration > CONFIG ETH Port



At this menu, setup for LCU Ethernet address is provided.



Figure 3-139 System > LCU Configuration > CONFIG ETH Port >



Select you want to modify, and press [SET] button to open a setup screen.



Table 3-62 Contents of System > LCU Configuration > CONFIG ETH Port Item



Displayed contents and setting range



Description



IP address



xxx.xxx.xxx.xxx



IP address setup



Subnet mask



xxx.xxx.xxx.xxx



Subnet mask setup



Gateway



xxx.xxx.xxx.xxx



Gateway setup



LMMS IP



xxx.xxx.xxx.xxx



LMMS IP setup



Page 3-132



MARU 310/320 DME Technical Manual Volume I, Section 3



LCU Configuration > CONFIG COMM Port



At this menu, you can change setup for Communication Baudrate and Line type



Figure 3-140 System > LCU Configuration > Config COMM Port >



Select you want to handle and press [SET] button to open a setup screen.



Table 3-63 Contents of System > LCU Configuration > Config COMM Port Item LOCAL COMM BAUD REM1 COMM BAUD REM2 COMM BAUD REM1 Line Type



Displayed contents and setting range 300 ~ 115200 bps 300 ~ 115200 bps 300 ~ 115200 bps



REM1 MODEM Status



RS-232 / LEASED LINE / DIAL-UP RS-232 / LEASED LINE / DIAL-UP CONNECTED /DISCONNECTED / N /A



REM2 MODEM Status



CONNECTED /DISCONNECTED / N /A



REM2 Line Type



Page 3-133



Description LCU Local communication Baudrate setup REM1 communication Baudrate setup REM2 communication Baudrate setup REM 1 Line Type setup REM 2 Line Type setup REM1 Modem connection status REM2 Modem connection status



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.10.



Power Supply Power Supply menu displays status and output voltage/current of PSU units.



Figure 3-141 PSU >



Submenus of Power Supply menu are as follows.



Table 3-64 Contents of PSU Submenu



Description



PSU Status



AC/DC, DC/DC, battery status display



PSU Measurement



AC/DC, DC/DC, battery voltage/current display



Figure 3-142 Power Supply menu map



Page 3-134



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.10.1.



PSU Status At this menu, status information of PSU is provided.



Figure 3-143 PSU > PSU Status >



Table 3-65 Contents of PSU > PSU Status Item



Displayed contents



Description



AC/DC1 Module



NORMAL / UNPLUGGED /---- / MODULE FAIL / INPUT FAIL



AC/DC1 module status



AC/DC2 Module



NORMAL / UNPLUGGED / ---- / MODULE FAIL / INPUT FAIL



AC/DC2 module status



DC/DC1 Module



NORMAL / UNPLUGGED / FAIL



DC/DC1 status



DC/DC2 Module



NORMAL / UNPLUGGED / FAIL



DC/DC2 status



Battery1



NORMAL / UNPLUGGED / FAIL



Battery1 status



Battery2



NORMAL / UNPLUGGED / FAIL



Battery2 status



Page 3-135



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.10.2.



PSU Measurement At this menu, information of output voltage and current values of PSU is provided.



Figure 3-144 PSU > PSU Measurement >



Table 3-66 Contents of PSU > PSU Measurement Item



Unit



Description



DC/DC1+50V Voltage



V



DC/DC1 +50V Voltage measured



DC/DC1 +50V Current



A



DC/DC1 +50V Current measured



DC/DC2 +50V Voltage



V



DC/DC2 +50V Voltage measured



DC/DC2 +50V Current



A



DC/DC2 +50V Current measured



AC/DC1 +27V Voltage



V



AC/DC1 +27V Voltage measured



AC/DC1 +27V Current



A



AC/DC1 +27V Current measured



AC/DC2 +27V Voltage



V



AC/DC2 +27V Voltage measured



AC/DC2 +27V Current



A



AC/DC2 +27V Current measured



Battery1 +27V Voltage



V



Battery1 +27V Voltage measured



Battery1 +27V Current



A



Battery1 +27V Current measured



Battery2 +27V Voltage



V



Battery2 +27V Voltage measured



Battery2 +27V Current



A



Battery2 +27V Current measured



Page 3-136



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.11.



Information



Information menu displays the date and time of the system and basic information of each unit.



Figure 3-145 Information >



Submenus of Information menu are as follows.



Table 3-67 Contents of Information Submenu



Description



DATE & TIME



Setting System Date & Time



LCU



LCU version information and SD card capacity



TCU1



TCU1 version information



TCU2



TCU2 version information



MON1



MON1 version information



MON2



MON2 version information



RMU1-LCU



RMU1-LCU version information



RMU2-LCU



RMU2-LCU version information



Page 3-137



MARU 310/320 DME Technical Manual Volume I, Section 3



Information



Date & Time



System date



System time



Boot-Up date



LCU



Unit version



Software version



Unit ID



SD Card Total Size



SD Card Free Size



TCU1



Unit version



Software version



Unit ID



TCU2



Unit version



Software version



Unit ID



MON1



Unit version



Software version



Unit ID



MON2



Unit version



Software version



Unit ID



RMU1-LCU



Unit version



Software version



Unit ID



RMU2-LCU



Unit version



Software version



Unit ID



Figure 3-146 Information menu map



Page 3-138



Boot-Up time



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.11.1.



DATE & TIME At this menu, you can see boot-up date / time of the system, and change system date / time.



Figure 3-147 Information > DATE & TIME >



To change the system date or system time, select you want to change, and press [SET] button.



Table 3-68 Contents of Information > DATE & TIME Item System Date



Displayed contents and setting range yyyy-mm-dd



System date setup



System Time



hh:mm:ss



System time setup



Boot-up Date



yyyy-mm-dd



System boot-up date



Boot-up Time



hh:mm:ss



System boot-up time



Page 3-139



Description



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.11.2.



LCU At this menu, HW/SW/SD card information of LCU is provided.



Figure 3-148 Information > LCU >



Table 3-69 Contents of Information > LCU Item



Displayed contents



Description



Unit VER



1.xx



LCU HW version



S/W VER



1.xx.xxxx



LCU SW version



Unit ID



LC



Unit name



SD Card Total Size



xxxx KB



SD Card capacity displayed



SD Card Free Size



xxxx KB



Free space of SD Card capacity



Page 3-140



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.11.3.



TCU 1 / 2 At this menu, HW/SW information of TCU 1 / 2 is provided.



Figure 3-149 Information > TCU1 >



Table 3-70 Contents of Information > TCU1 / 2 Item



Displayed contents



Description



Unit VER



1.xx



TCU HW version



S/W VER



1.xx.xxxx



TCU SW version



Unit ID



TCU1 / TCU2



Unit name



Page 3-141



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.11.4.



MON1 / 2 At this menu, HW/SW information of MON1 / 2 is provided.



Figure 3-150 Information > MON1 >



Table 3-71 Contents of Information > MON1 / 2 Item



Displayed contents



Description



Unit VER



1.xx



MON HW version



S/W VER



1.xx.xxxx



MON SW version



Unit ID



MON1 / MON2



Unit name



Page 3-142



MARU 310/320 DME Technical Manual Volume I, Section 3



3.2.11.5.



RMU 1 / 2 - LCU At this menu, HW/SW information of RMU 1 / 2 – LCU is provided.



Figure 3-151 Information > RMU1 -LCU >



Table 3-72 Contents of Information > RMU1 / 2-LCU Item



Displayed contents



Description



Unit VER



1.xx



RMU HW version



S/W VER



1.xx.xxxx



RMU SW version



Unit ID



RM



Unit name



Page 3-143



MARU 310/320 DME Technical Manual Volume I, Section 3



Page 3-144



MARU 310/320 DISTANCE MEASURING EQUIPMENT



Technical Manual



VOLUME I SYSTEM DESCRIPTION, OPERATIONS AND MAINTENANCE



SECTION 4 MAINTENANCE



Intentional Blank Page



MARU 310/320 DME Technical Manual Volume I, Section 4



Table of Contents Section 4. 4.1.



4.2. 4.3. 4.4. 4.5.



4.6.



MAINTENANCE ............................................................................................... 4-1



INTRODUCTION .................................................................................................................4-1 4.4.1. General ......................................................................................................................4-1 4.4.2. Design ........................................................................................................................4-1 4.4.3. Control and Monitoring .............................................................................................4-1 4.4.4. Fault Isolation ............................................................................................................4-2 4.4.5. Maintenance Planning ...............................................................................................4-2 Standards and Tolerances.......................................................................................................4-3 Periodic Maintenance ............................................................................................................4-4 Routine Tests .........................................................................................................................4-6 Routine maintenance .............................................................................................................4-7 4.5.1. Cleaning .....................................................................................................................4-7 4.5.2. Other Checks .............................................................................................................4-7 4.5.3. Antenna Installation Inspection .................................................................................4-7 4.5.4. Standby Operation Test ..............................................................................................4-8 Maintenance operation procedures using external instruments ...........................................4-10 4.6.1 Necessary Tools and Instruments.............................................................................4-10 4.6.2. Output Power Measurement ....................................................................................4-10 4.6.3. Pulse Shape, Pulse Spacing, and Reply Delay .........................................................4-13 4.6.4. Transponder Frequency Measurement .....................................................................4-15 Pulse Spectrum ........................................................................................................4-16 4.6.5. 4.6.6. Transmission Rate....................................................................................................4-16 4.6.7. Monitor Interrogation - Pulse Shape, Pulse Spacing, and Peak Pulse Level ...........4-16 4.6.8. Power Supply Measurements...................................................................................4-17 4.6.9. Verification with Diagnostic Function .....................................................................4-18 4.6.10. Output Power Adjustment........................................................................................4-18 4.6.11. Monitor Detector Calibration Procedure .................................................................4-18 4.6.12. Transmitted Power Calibration Procedure ...............................................................4-19



Page i



MARU 310/320 DME Technical Manual Volume I, Section 4



Page ii



MARU 310/320 DME Technical Manual Volume I, Section 4



Section 4. MAINTENANCE 4.1.



INTRODUCTION



4.4.1.



General This section provides all the information you will need to maintain MARU 310/320 Distance-Measuring Equipment (DME) ground equipment. It provides standards and tolerances, maintenance requirements, required test equipment, performance check procedures, information supporting station flight check, alignment and adjustment procedures, and procedures for identifying and replacing faulty modules. It also provides procedures for using external instruments (oscilloscopes, DVM, etc.) to confirm essential system parameters. NOTE Any procedures that are not part of normal preventive maintenance should be used only at the discretion of skilled maintenance personnel.



4.4.2.



Design The MARU 310/320 design includes state of the art techniques and parts that minimize the equipment maintenance needs and maximize its life span: ƒ Digital circuits and microprocessor-controlled maintenance requirements.



transponders



reduce



periodic



ƒ The main parameters are kept at their preset values for the life of the system, which reduces drift from temperature variations and aging.



ƒ High-precision microprocessor-controlled monitors check the radiated signal and, if a failure occurs, switch over to the standby transmitter or completely shut down the system; consequently, the system does not emit faulty signals. Each monitor is a completely programmable DME instrumentation set capable of performing all the tests and checks required for routine maintenance and automatic diagnostics.



ƒ Built-in-test-equipment (BITE) simplifies maintenance tasks.(Module structure) The advantage of this design is that your periodic maintenance intervals can be long and can include a minimum of measurements.



4.4.3.



Control and Monitoring Since the equipment is not typically controlled by a local operator, we have designed it to be easily monitored and controlled by a personal computer (PC). An operator can use the PC keyboard and display, locally or remotely, to measure and control the main parameters of the DME transponder and to perform built-in tests.



Page 4-1



MARU 310/320 DME Technical Manual Volume I, Section 4



4.4.4.



Fault Isolation The modules themselves offer the fastest method for identifying faults. Each module has a light-emitting diode (LED) that is green during normal operation and red during failure. Consequently, an on-site operator can very rapidly assess the status of the modules by checking to make sure none of their LEDs are red. An off-site operator can troubleshoot with the equipment’s built in DIAGNOSTIC function, which tests the modules and displays the names of any that are faulty. If one of the modules is faulty, it can be quickly and easily replaced since all the modules are plug-in types and are easily accessed from the front of the cabinet.



4.4.5.



Maintenance Planning Plan your preventive maintenance activities according to local regulations. This section provides recommendations for initial preventive maintenance schedules and activities. Once you have confirmed that the system is stable, you can extend the maintenance intervals.



Page 4-2



MARU 310/320 DME Technical Manual Volume I, Section 4



4.2.



Standards and Tolerances The standards and tolerances for the MARU 310/320 are listed in below. Parameter



Lower Limit



Standard



Reply delay



Standard minus 0.2 μs



Assigned at commissioning



Standard 0.2 μs



plus



Reply coding



Standard minus 0.1 μs



Assigned at commissioning



Standard 0.1 μs



plus



Reply efficiency



70%



95%



...



Transmitter power



-3.0 dB of standard



Assigned at commissioning



...



Radiated power



-3.0 dB of standard



Assigned at commissioning



...



Transmitter pulse rate



80 pulse pairs per second (PP/S) below minimum



Assigned at commissioning 700-5400 PP/S



...



Transmitter pulse rise time



1 μs



1.5 μs



3 μs



Transmitter pulse width



3 μs



3.5 μs



4 μs



Transmitter pulse fall time



1 μs



1.5 μs



3 μs



Ident cycle time



25 s



30 s



35 s



Transmitter frequency



-0.001%



Nominal channel frequency



+0.001%



50 / 27V DC Power supply (MARU 310/320)



48 V



50 V



52 V



25 V



27 V



29 V



5 V supply(internal of unit)



4.75 V



5.00 V



5.25 V



-5V supply(internal of unit)



-5.25



-5V



-4.75V



15 V supply(internal of unit)



14.25 V



15.00 V



15.75 V



-15 V supply(internal of unit)



-15.75 V



-15.00 V



-14.25 V



AC supply



195 VAC



220 VAC



265 VAC



Page 4-3



Upper Limit



MARU 310/320 DME Technical Manual Volume I, Section 4



4.3.



Periodic Maintenance Each parameter of the transponder on antenna is measured in real time by the monitor(s). The monitors incorporate BITE to verify all aspects of system performance. These instruments are constantly verified by their own self-checks, the monitor integrity check, for example. So failures are detected automatically. If a monitor fails, it will shut itself off and generate a failure message. Performance checks and periodic maintenance for the MARU 310/320 DME should be initially performed properly. Many performance checks consist of running preprogrammed tests and comparing the results to previously recorded data. The frequency of periodic maintenance can be reduced according to operator's requirements, environmental conditions, and the practical experience collected over time. Every parameter to be measured is associated with the corresponding limits according to Annex 10, Doc. 8071 Part III DME International Civil Aviation Organization (ICAO) specifications, the standards and tolerances in paragraph 5.2, and manufacturer's data in section 4. The built-in tests are performed using a local or remote PC. The parameters measured with the EXECUTIVE MONITORING and ROUTINE CHECK programs may be viewed using the CHECKS menu. In addition to the standard tests, the skilled operator may use the CONFIGURABLE MEASUREMENT tests to create special tests (not provided by the system) necessary to perform particular checks. Before starting every maintenance procedure, it is useful to analyze any possible alarm or warning condition which may have occurred from the last maintenance intervention so as to perform more accurate controls on the parameters that show signs of degradation. At the end of the maintenance procedures, print the last Routine Check and the data relating to every measurement performed; compare them to the previous data and to the data obtained upon installation. The operator should test both transponders and should use the diagnostic function (DIAGNOSTIC TEST) to do a final test on both of them. For the shelter, air conditioner, and emergency battery (if applicable), observe the manufacturer's maintenance recommendations.



Page 4-4



MARU 310/320 DME Technical Manual Volume I, Section 4



Procedure



Initial Performance Interval*



Comments



Routine tests



Monthly



Transponder frequency measurement Power supply measurements Monitor operation, transfer, and shut-down performance Operate station on standby batteries Other general checks and maintenance



Annually



Perform locally or remotely using PC Performed at DME facility



Annually Semiannually



Performed at DME facility Performed at DME facility



Semiannually



Performed at DME facility



Semiannually



Performed at DME facility



Page 4-5



MARU 310/320 DME Technical Manual Volume I, Section 4



4.4.



Routine Tests Routine performance tests verify the proper performance of the DME transponder and monitor and should be part of periodic maintenance. All limits should conform to the tolerances in table 5-1 or those dictated by local regulations. All tests must pass.



Page 4-6



MARU 310/320 DME Technical Manual Volume I, Section 4



4.5.



Routine maintenance WARNING To avoid an electrical shock, make sure that the equipment is turned off before you do any routine maintenance.



4.5.1.



Cleaning Clean the outside and inside of the shelter, if necessary. Clean the inside and outside of the equipment cabinet when necessary. Always use a vacuum cleaner to avoid transferring dirt to DME cabinet during the cleaning. CAUTION Use only anti-static brushes and dusters. Also, use only a soft cloth; do not use corrosive and abrasive substances. The CSP front panel may be damaged by some types of cleaning chemicals. To remove dirt from the CSP panel, moisten a cloth with ethyl alcohol, glycol, or clean water and remove dirt.



Only dust the subassemblies in conjunction with the necessary removal of a subassembly and, even then, only if you can see dust on them. If you dust them, use a vacuum cleaner if you can; otherwise use a soft brush. During such operations, it is essential to observe all precautionary measures for static-sensitive semiconductors.



4.5.2.



Other Checks Inspect all components to ensure that there is no damage, corrosion, or evidence of overheating. Verify that all components are securely mounted and that all electrical connections are secure.



4.5.3.



Antenna Installation Inspection Thoroughly inspect the antenna installation (mast, antenna cables and connectors, power cable, and obstruction lights) for damage caused by corrosion or by rodents, termites, or other pests. The frequency of inspections depends on the site’s environment.



Page 4-7



MARU 310/320 DME Technical Manual Volume I, Section 4



Make sure all RF cable connections (internal and external) are tight.



4.5.4.



Standby Operation Test These procedures provide for checking the station batteries and correcting any deficiencies that may be found and should be performed as part of periodic maintenance.



WARNING Flooded batteries generate an explosive gas under normal operating conditions. Take care to avoid creating sparks that could ignite this gas. Ensure that no tools or other metal objects can fall onto the batteries or otherwise contact the batteries and cause a short. Batteries contain a very corrosive electrolyte that can cause serious injury to the skin and eyes. Wear proper protective clothing and eye, hand, and face protection when working with the batteries.



ƒ Inspect each battery and verify it has no bulges, cracks, or other deformations. Replace any defective batteries. ƒ Check all battery terminal connections and verify they are tight and corrosion-free. ƒ Check that batteries are clean and corrosion free. If necessary, remove dust or dirt by wiping with a water-moistened cloth. If there is electrolyte on the surface of a sealed battery, the battery has failed and should be replaced. If there is electrolyte on the outer surfaces of a flooded battery, neutralize it with a solution made up of 1/2-pound baking soda in 1 quart of water (0.22-kilograms measurements soda/liter water). Initially, this solution will bubble. The electrolyte is neutralized when bubbling no longer occurs when fresh solution is applied. When electrolyte is neutralized, wipe battery clean with a water-moistened cloth. Dry battery with a dry clean cloth. ƒ Using a digital multimeter or equivalent, measure the voltage across all batteries. voltage should be approximately 27 volts DC. Record this voltage.



This



ƒ Divide the voltage recorded in step d by 4 and record this voltage. ƒ Measure and record voltage across each battery. be the voltage recorded in step e ±0.2 volts DC.



The voltage across each battery should



ƒ Turn off the AC power and record the time. ƒ Measure and record voltage across the battery supply.



Page 4-8



MARU 310/320 DME Technical Manual Volume I, Section 4



ƒ Measure and record the voltage across the battery supply. This voltage should be no less than 0.2 volts DC less than the voltage recorded in measured level. If battery supply fails this check, measure and record voltage across each battery. Replace the battery that is causing the drop in voltage. Charge the new battery and repeat. ƒ Turn on the AC power.



Page 4-9



MARU 310/320 DME Technical Manual Volume I, Section 4



4.6.



Maintenance operation procedures using external instruments These paragraphs show you how to externally verify some of the important measurements made using test equipment built in to the DME. These procedures can be used as part of preventive maintenance or at the discretion of the maintenance technician. NOTE Some of the following maintenance procedures interrupt normal operation of the DME. Follow local regulations to notify air traffic control authorities before removing a DME from service.



4.6.1



Necessary Tools and Instruments This is a list of test equipment required for site level maintenance of the DME. You may use equivalent test equipment. You may also need screwdrivers, pliers, and wrenches. A 5/16-inch, 5-inch-pound torque wrench is recommended for tightening the SMA cable connector nuts. In addition to the material supplied with the beacon (tool kit and extender board), the following measuring instruments are required. ƒ PC (lap/palm top or standard PC), cable connection, startup disk, printer, adapter connectors ƒ Oscilloscope, dual or four vertical channels, at least 60 MHz BW, type (Tek 2235A or PM3050) ƒ Multimeter (input 1 MΩ impedance) ƒ Peak power meter (E4416A, EPM series) and a series of precision attenuators (± 1 dB) 10 dB/5 W, 20 dB/1 W, 30 dB/1 W (or directional coupler) or Bird wattmeter (digital RF model 4391 with elements: 1000J, 250J, 100J, 25J) ƒ Frequency counter up to 2 GHz ( or 5315A-H10-003, Tek CMC251) ƒ Spectrum analyzer up to 2 GHz



4.6.2.



Output Power Measurement



4.6.2.1.



On Dummy Load Procedure NOTE This test will allow the on antenna transponder to continue normal operation (dual systems only).



Page 4-10



MARU 310/320 DME Technical Manual Volume I, Section 4



ƒ Perform the EXECUTIVE MONITORING or Routine Check on transmitter (TRX) in dummy load (Maintenance Environment). ƒ Verify and record the peak power value. ƒ connect a wattmeter to the Antenna port. If a peak power meter is used, attach the probe to the relay using a 30-dB precision attenuator or 40 dB precision attenuator. If you use a Bird wattmeter, install the wattmeter with a short cable. You must put a RF load on the output of the wattmeter. CAUTION Do not set the beacon to OPERATING when the antenna or dummy load is not connected. ƒ Set the beacon to operating and read the measured power. ƒ Verify that the value read is equal to the value recorded by internal monitor(s) (±20 percent). ƒ At the end of the measurements, take note of the values concerning both transponders and restore the initial connections.



4.6.2.2.



On-Antenna Procedure NOTE This test will take the system off the air during instrument connection. ƒ Connect test equipment as shown in figure 4-1 for the Bird-type peak power meter set up . ƒ Perform the EXECUTIVE MONITORING or Routine Check at Peak Power Output measurement on TRX in dummy load (Maintenance Environment). ƒ Verify and record the peak power value. ƒ Switch off the beacon. CAUTION Do not set the beacon to OPERATING when the antenna or dummy load is not connected. ƒ Set the transponder to be measured to operating and read the value by the instrument. ƒ Verify that the value read is equal to the value recorded by internal monitor(s) ƒ At the end of the measurements, take note of the values concerning both transponders and restore the initial connections.



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MARU 310/320 DME Technical Manual Volume I, Section 4



to ANTENNA PEAK POWER METER (BIRD Model 4391 type)



Heliax 1/2" cable



Plug-in ELEMENTS



Use with TWO Plug-In ELEMENTS as appropriate: FORWARD HIGH Power - 1000J REVERSE LOW Power - 100J FORWARD LOW Power - 250J REVERSE LOW Power - 25J



Antenna connector



Cable assembly, RF, 30 cm RG214 - N male



MARU 310/320



Figure 4-1 Output Power Test on Antenna Procedures - Test Set-up (Bird 4391)



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MARU 310/320 DME Technical Manual Volume I, Section 4



4.6.3.



Pulse Shape, Pulse Spacing, and Reply Delay This procedure allows the operator to measure the pulse shape and pulse spacing of the transmitter output. The operator can also measure the system reply delay. The procedure uses a dual channel oscilloscope and is not as accurate as the technique used in the monitor. ƒ Adjust the time base and trigger to allow the interrogations on channel one and the replies on channel two to be displayed on the screen. ƒ To enter the maintenance mode. Select checks and then configurable measurement. Set up the configurable measurement screen as follows.



1. Rise Time. Examine the pulses on channel two of the oscilloscope. Set the oscilloscope time base to 1 or 2 μs. To measure the rise time, measure the time for the leading edge of the pulse to transition from 10 percent of its peak value to 90 percent of its peak value. 2. Duration. Examine the pulses on channel two of the oscilloscope. Set the oscilloscope time base to 1 or 2 μs. To measure the duration, measure the time between the 50 percent point of a pulse rise time and the 50 percent point of the pulse fall time. 3. Decay Time. Examine the pulses on channel two of the oscilloscope. Set the oscilloscope time base to 1 or 2 μs. To measure the fall time, measure the time for the trailing edge of the pulse to transition from 90 percent of its peak value to 10 percent of its peak value. See the Figure 4-2 Typical Transmitter Pulse Shape. 4. Pulse Spacing. Examine a pulse pair on channel two of the oscilloscope. To accurately measure the pulse spacing, measure the time between the 50 percent point of the pulse rise time of the first pulse and the 50 percent point of the pulse rise time of the second pulse. See the Figure 4-3 Pulse Spacing Measurement. 5. Reply Delay. Channel one shows the interrogation pulses. Channel two shows the transmitter pulses. Set the oscilloscope time base to 10 or 20 μs. Accurately measure the time from the 50 percent point of the leading edge of the first constituent pulse of the first pulse pair on channel one to the 50 percent point of the leading edge of the first constituent pulse of the first pulse pair on channel two. See the Figure 4-4 Reply Delay Measurement (X Channels) 6. Verify that the values read on the scope are equal (±5 percent) to the values measured by the monitors. The monitor measures these parameters in the routine check. The readings from the routine check should be consistent with the tolerances in paragraph 4.2.



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MARU 310/320 DME Technical Manual Volume I, Section 4



Figure 4-2 Typical Transmitter Pulse Shape



Figure 4-3 Pulse Spacing Measurement



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MARU 310/320 DME Technical Manual Volume I, Section 4



Figure 4-4 Reply Delay Measurement (X Channels)



4.6.4.



Transponder Frequency Measurement This procedure measures the DME transponder frequency. The frequency source used by the transmitter and receiver is located in the receiver module. ƒ Connect PC to DME Top Interface panel RS-232 connector(or Ethernet ). ƒ Log on. Use Commands to turn beacon one off. ƒ Connect frequency counter to the FREQ connector of TXU Unit. ƒ Frequency counter should indicate station assigned carrier frequency ±0.001 percent. ƒ Disconnect adapter, cable, and frequency counter. ƒ Replace transmitter. ƒ Restore the system to normal operation. ƒ Log off.



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MARU 310/320 DME Technical Manual Volume I, Section 4



4.6.5.



Pulse Spectrum



4.6.5.1.



Procedure ƒ Go to maintenance mode. This will bypass the monitor to keep the transmitter on the air. Connect the spectrum analyzer to the coaxial cable coming from one of the two antenna probes (remove the cable from its connector on top of the equipment cabinet). ƒ Use a 30 to 100 kHz/div bandwidth and select the beacon frequency for the spectrum analyzer. Position the spectrum lines on the raster center of the instrument display and adjust the signal peak level so that it touches the first top line of the raster. ƒ Verify that, with FREQUENCY SPAN equal to 0.5 MHz/div, all the spectrum lines at a frequency greater than the beacon frequency ±2 MHz are attenuated by at least 60 dB for MARU 320 and 50 dB for MARU 310 with respect to the beacon frequency peak level, at raster center. ƒ Verify that, with FREQUENCY SPAN equal to 0.2 MHz/div, all the spectrum lines at a frequency greater than the beacon frequency ±0.8 MHz are attenuated by at least 47 dB for MARU 320 and 37 dB for MARU 310 with respect to the beacon frequency peak level, at raster center. ƒ At the end of the measurements, take note of the values concerning both transponders and restore the initial connections. Exit maintenance mode.



4.6.6.



Transmission Rate



ƒ Perform the executive monitoring on antenna and/or the Routine Check. ƒ Verify the transmission pulse rate value comes within the limits indicated in paragraph 4.2. ƒ Set the counter to read the frequency values in the low frequency range (