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Sailor Inmarsat B Workshop Manual

Manual is about: SAT-B Ship Earth Station

Summary of Inmarsat B

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    Sailor inmarsat b workshop manual w4400gb0

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    Inmarsat b workshop manual 9905.

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    9936 please note any responsibility or liability for loss or damage in connection with the use of this product and the accompanying documentation is disclaimed. The information in this manual is furnished for informational use only, is subject to change without notice, may contain errors or inaccura...

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    9936 contents 1 introduction 1-1 1.1 system components 1-2 1.2 technical data 1-2 2 system description 2-1 2.1 above deck equipment 2-1 2.2 below deck equipment 2-6 3 module description 3-1 3.1 above deck equipment 3-1 3.2 below deck equipment 3-16 4 accessories 4-1 4.1 sc4350 control unit 4-1 4.2 s...

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    Contents inmarsat b 6.24 speed 6-18 6.25 sps 6-18 6.26 status 6-19 6.27 su 6-20 6.28 test 6-20 6.29 time 6-22 6.30 vdp 6-23 6.31 version 6-23 7 trouble shooting 7-1 7.1 battery backup 7-1 7.2 real-time clock 7-1 7.3 eeprom 7-1 7.4 inmarsat ids 7-2 7.5 +15v dc 7-2 7.6 factory reset 7-2 7.7 tx inhibit...

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    Contents inmarsat b 9936 7.43 ade idle 7-14 7.44 antenna direction 7-14 7.45 ade azimuth rate sensor 7-15 7.46 ade elevation rate sensor 7-15 7.47 ade cross-elevation rate sensor 7-15 7.48 ade inclinometer 7-16 7.49 ade connection stability 7-16 7.50 vdp running 7-17 7.51 vdp modem detected 7-17 7.5...

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    Contents 1 introduction 1-1 1.1 system components 1-2 1.2 technical data 1-2 9849 inmarsat b.

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    Page 1-1 inmarsat b 9936 1 introduction this manual describes the technical aspects of the inmarsat b terminal. The purpose of the manual is to provide the service technician with the knowledge about the system needed to locate faults and carry out repair and performance checks after repair. The con...

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    1 introduction inmarsat b page 1-2 9901 1.1 system components an inmarsat b terminal can be supplied with various types of service and accessories. The drawing below shows an installation with the various types of accessories. Ade: the ade (above deck equipment) consists of a stabilised platform poi...

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    1 introduction inmarsat b page 1-3 inmarsat b 9936 sat-b transceiver s.P. Radio denmark pabx connection or push button telephone 32213e gyro nmea gps nmea pabx heading information 56/64 kbit/sec. Async./sync. Position information personal computer heading information or gyro distress key sd4360 tran...

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    1 introduction inmarsat b page 1-4 9936 1.2 technical data designation: sat-b ship earth station (ses) maritime class 1 with area group call capability and normal tuning range, designed according to inmarsat b system definition manual and gmdss requirements. Configuration: sat-b antenna sa4415 sat-b...

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    Contents 2 system description 2-1 2.1 above deck equipment 2-1 2.1.1 principle of stabilisation 2-2 2.1.2 components of the stabilisation system 2-3 2.1.3 antenna behaviour during start-up sequence 2-4 2.1.4 antenna behaviour during global search 2-4 2.1.5 antenna behaviour during region shift searc...

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    Page 2-1 inmarsat b 9901 2 system description the two main parts making up a terminal are described in this chapter. The description of the antenna unit (ade) consists of two parts, one concerning the rf and one about the stabilisation. The other main part of the terminal is the transceiver unit. 2....

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    2system description inmarsat b page 2-2 9936 antenna unit and transceiver unit is status and fail information from the antenna and configuration data. Configuration data concerns frequency set-up of the synthesizer, down converter filter selection, and transmitter power level. The received data from...

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    2 system description inmarsat b page 2-3 9936 the controller function of the stabilisation system is performed by the tracking and stabilisation processor board (tsp board). In addition to the three axes contributing to the active stabilisation (az, el and ce) the antenna is equipped with a horizont...

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    2system description inmarsat b page 2-4 9936 2.1.3 antenna behaviour during start-up sequence when the complete system, or just the ade, has been reset or switched off and on, the ade will initialize and search for the satellite. The behaviour of the antenna during this process is described in this ...

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    2 system description inmarsat b page 2-5 9936 when a region shift search is performed, the satellite dish first turns to the direction 15° [45°] to the left (or right, depending on which is closer) of the expected position of the satellite. From this point it performs a horizontal search to the poin...

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    2system description inmarsat b 2.2 below deck equipment the below deck equipment or transceiver unit as it is called consists of five printed circuit boards (modules) as shown in fig. 2.3. Pax csp/vdp modem sps rear panel connectors smi smps 35974 fig. 2.3. Sps board the sps (signal path and synthes...

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    2 system description inmarsat b page 2-7 9936 pax board the pax board (phone and fax) contains hardware and software for interfacing with a fax machine and with push button telephones like a stand-alone telephone or a pabx network. The module also acts as an interface for data communication from a s...

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    Contents 3 module description 3-1 3.1 above deck equipment 3-1 3.1.1 antenna 3-1 3.1.2 diplexer 3-2 3.1.3 lna 3-2 3.1.4 down converter 3-3 3.1.5 up converter 3-4 3.1.6 hpa 3-4 3.1.7 tracking receiver 3-5 3.1.8 triplexer 3-6 3.1.9 synthesizer for tracking receiver 3-8 3.1.10 synthesizer for up/down c...

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    Page 3-1 9849 3 module description this chapter contains a description of the modules making up an inmarsat b terminal, including modules placed at the antenna unit and transceiver unit. 3.1 above deck equipment 3.1.1 antenna the antenna is a parabolic dish antenna as shown in fig. 3.1. 35971 sma co...

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    3module description inmarsat b page 3-2 9901 3.1.2 diplexer when a conversation is in progress via a satellite, the transmission mode is normally duplex which means that the transmitter and receiver are active simultaneously. To prevent the hpa from overloading the lna, an interconnection device is ...

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    3module description inmarsat b 3.1.4 down converter the purpose of the down converter is to convert an l-band signal to a fixed intermediate frequency of 21.4 mhz. A block diagram is shown in fig. 3.4. 20 khz 10 khz 100 khz filter module shift register 21.4 mhz data clock strobe lo-1 lo-2 35525 fig....

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    3module description inmarsat b 3.1.5 up converter the input signal to the up converter is mixed in two steps to cover the frequency band from 1626.5 to 1646.5 mhz. Lo-1 lo-2 output to hpa input from triplexer 62.9 mhz att 150 mhz 150 mhz att 1636.5 35526 fig. 3.5. The input signal to the up converte...

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    3module description inmarsat b page 3-5 9901 to reject out of band signals, a helical filter is placed at the input of the hpa. The output signal from the up converter can vary approximately 17 db depending on the length of the cable between bde and abe, temperature variations and am fluctuations in...

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    3module description inmarsat b page 3-6 9901 if, adjacent channel selectivity is obtained in a crystal filter. Between the mixer and crystal filter, a 6 db attenuator is used to improve the termination impedance of the mixer if port. Second if consists of two integrated amplifiers of which the first...

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    3module description inmarsat b page 3-7 9905 62.9 mhz up converter signal the transmitter signal from the bde, which is a 62.9 mhz intermediate frequency signal, is taken out of the combiner/splitter block and is fed directly to an smb connector where the input of the up converter is connected. 21.4...

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    3module description inmarsat b page 3-8 9901 3.1.9 synthesizer for tracking receiver the two local oscillator signals used in the tracking receiver are generated on this synthesizer module. The first local oscillator which is used to mix the receiver frequency to first if is called l-band synthesize...

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    3module description inmarsat b page 3-9 9901 the integrated pll circuit contains phase detector, divider for reference frequency, divider with modulus two architecture and built in l-band prescaler with a division ratio of 64/65. The 10.08 mhz reference frequency is divided by 32 in the reference di...

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    3module description inmarsat b page 3-10 9901 3.1.10 synthesizer for up/down converter the up and down converter synthesizers are two separate units but placed on the same printed circuit board. Up converter synthesizer the two local oscillator signals used in the up converter are generated on this ...

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    3module description inmarsat b page 3-11 9901 l-band synthesizer the l-band oscillator is based on a voltage controlled oscillator (vco) with good close in phase noise properties. Frequency stability is obtained using a pll circuit, the vco locked to the highly stable reference frequency supplied fr...

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    3module description inmarsat b page 3-12 9901 loop 1 pd :32 vco :n :64/65 :a pd :63 vco :n :a :20/21 :a :n :20/21 :64 pd vco vhf l band lock det. Loop 2 10.08 mhz from triplexer to tsp from pll lock signals 35534 fig. 3.11. L-band synthesizer the l-band oscillator is based on a voltage controlled os...

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    3module description inmarsat b the integrated pll circuits used in loop 1 and 2 do not include the prescaler. Therefore, external prescalers with a division ratio of 21/22 are used. The loop filters are of same type as the one used in the l-band synthesizer. The vco’s are a colpitts-clapp type, buil...

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    3module description inmarsat b to avoid uncontrolled transmission during a fail condition, a signal called dead man’s button (dmb) is used to control the 28v adjustable voltage. Two modules generate dmb signals, i.E. Hpa and tsp. Dmb signals are square wave voltages with frequencies of 500 hz and 3 ...

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    3module description inmarsat b the leds the tsp board is equipped with 3 leds (smd types): a pair consisting of a red (v10) and a green (v9) placed between the cpu and the sram and a red led (v8) placed almost at the centre of the board. V8, red led, reset source indicator this led should normally a...

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    3module description inmarsat b 3.2 below deck equipment 3.2.1 sps board the sps board consists of baseband for if converters to both transmitter and receiver signal paths, data receiver and transmitter equal to those placed on the triplexer board, the system reference oscillator and a digital signal...

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    3module description inmarsat b i and q baseband signals taken out of the if ports of the mixers are amplified by operational amplifiers before they are filtered in low-pass switch capacitor filters. Those filters are of the same type as those used in the transmitter part. The cut off frequency of th...

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    3module description inmarsat b 3.2.2 modem board the modem is the module which takes care of the coding/decoding of data/baseband signals. Depending on which service types the transceiver unit covers, different modem configurations can be found in it. A combined modem (629347) covers all service typ...

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    3module description inmarsat b 3.2.3 csp/vdp board the board (630953) is called the csp/vdp module and consists basically of two functionally separate parts. The csp (control and signalling processor) is the main system processor, which takes care of the satellite protocol, man/machine and external ...

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    3module description inmarsat b 3.2.4 pax board the pax board (631593) is an advanced interface for data, facsimile and phones. The board is controlled from the csp/vdp board through the tu bus. The central processor on the pax board, am186em-40, is an embedded version of the 186 processor, which is ...

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    3module description inmarsat b 3.2.5 smi board the switch mode power supply and interconnection board consists basically of two independent units. The interconnection takes care of the interface between sub-d connectors at the rear panel of the transceiver unit and the modules inside it. A block dia...

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    3module description inmarsat b 3.2.6 handset the handset is connected to the transceiver unit through the scanbus which contains both analogue and digital signals. The analogue signals are microphone signal from handset and loudspeaker signal to the handset. Both signals are balanced. Page 3-22 9936.

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    Contents 4 accessories 4-1 4.1 sc4350 control unit 4-1 4.2 sd4360 distress button 4-1 4.3 h4394/95 veritas connection box 4-1 4.4 h4396 t-connection box 4-2 9849 inmarsat b.

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    4 accessories this chapter describes units which can be connected to the transceiver unit. These include both control units and units used for installation. 4.1 sc4350 control unit the control unit sc4350 is a desk/bulkhead mounted keyboard/display unit, using a handset without display/keyboard. Nor...

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    4 accessories inmarsat b page 4-2 9936 component location veritas connection box the distress key activates a timer circuit which generates a 9 hz square wave voltage until the key is released. The square wave voltage is modified in the level converter to interface to the open collector circuit in t...

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    4 accessories inmarsat b page 4-3 inmarsat b 9849 diagram veritas connection box.

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    4 accessories inmarsat b page 4-4 9901 4.4 h4396 t-connection box component location t-connection box diagram t-connection box.

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    Contents 5 disassembling, connectors, module and software location 5-1 5.1 antenna unit 5-1 5.1.1 module and sensor location 5-1 5.1.2 mechanical disassembling 5-2 5.1.2.1 changing azimuth timing belt 5-2 5.1.2.2 changing elevation timing belt 5-2 5.1.2.3 changing cross elevation timing belt 5-2 5.1...

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    Contents inmarsat b 9936 5.2.2 connectors and software location 5-18 5.2.2.1 sps board 5-22 5.2.2.2 csp/vdp board 5-22 5.2.2.3 pax board 5-23 5.2.2.4 smi 5-23 5.2.2.5 lsd, hsd fpga and combi modem 5-24 5.3 handset 5-25 5.3.1 software location 5-25 5.4 control unit 5-25 5.4.1 software location 5-25.

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    Page 5-1 9936 5 disassembling, connectors, module and software location 5.1 antenna unit 5.1.1 module and sensor location 1 6 2 7 3 4 8 5 fig. 5.1 1. Tracking receiver unit part no. 729840 2. Hpa part no. 729430 3. Diplexer/lna part no. 730630 4. Dc motor controller for cross elevation axis part no....

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    5 mechanical disassembling and module location scansat-b page 5-2 9936 1 2 5.1.2 mechanical disassembling 5.1.2.1 changing azimuth timing belt fig. 5.4 1. Loosen the four screws holding the motor part no. 87.434 2. Remove the 3 mm screw holding the connection print part no. 86.962 3. Remove three 2....

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    5 mechanical disassembling and module location inmarsat b page 5-3 9936 5.1.2.4 changing horizontal axis timing belt fig. 5.7 1. Loosen the four screws holding the motor part no. 86.962 2. Loosen one 5 mm bolt, part no. 87.421 and remove the horizontal axis change the timing belt. 2 1 part no. 48.85...

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    5 mechanical disassembling and module location inmarsat b page 5-4 9905 5.1.3 connectors and software location 5.1.3.1 up/down converter unit part no.: 730650 connections: connector no.: x1, x2, x3, x4, x5 connector type: sma, coax connector no. Connection name to/from x1 62.9 mhz input to up conver...

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    5 mechanical disassembling and module location inmarsat b 9905 page 5-5 5.1.3.2 tracking receiver unit part no.: 729840 connections: connector no.: x1, x3 connector type: sma, coax connector no. Connection name to/from x1 l-band input to tracking receiver diplexer/lna unit x3 10.08 mhz reference to ...

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    5 mechanical disassembling and module location inmarsat b 5.1.3.3 hpa part no.: 729430 connections: connector no.: x1, x2 connector type: sma, coax connector no. Connection name to/from x1 output from hpa diplexer x2 input to hpa up converter connector no.: x3 connector type: molex, 2 x 10 pins pin ...

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    5 mechanical disassembling and module location inmarsat b 5.1.3.4 diplexer/lna part no.: 730630 connections: connector no.: x1, x2, x3, x4 connector type: sma, coax connector no. Connection name to/from x1 lna output down converter x2 lna output tracking receiver x3 diplexer input/output antenna x4 ...

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    5 mechanical disassembling and module location inmarsat b software: component no. Description spare part no. D15 tracking & stabilisation 732514 d16 tracking & stabilisation 732515 connections: connector no.: x19 connector type: 3m, 2 x 5 pins pin no. Connection name colour to/from 1 +18v grey, ribb...

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    5 mechanical disassembling and module location inmarsat b connector no.: x22 connector type: molex, 2 x 3 pins pin no. Connection name colour to/from 1 hpa_sel green hpa 2 hpa_read_req blue hpa 3 hpa_data_clock violet hpa 4 hpa_data_to_hpa grey hpa 5 hpa_data_from_hpa white hpa 6 ground black hpa co...

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    5 mechanical disassembling and module location inmarsat b connector no.: x27 connector type: molex, 2 x 5 pins pin no. Connection name colour to/from 1 az_phase_a green step motor driver, az 2 ground black step motor driver, az 3 az_phase_b blue step motor driver, az 4 az_phase_c violet step motor d...

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    5 mechanical disassembling and module location inmarsat b connector no.: x1 connector type: 3m, 2 x5 pins pin no. Connection name colour to/from 1 +18v dc grey ribbon cable smps/tsp 2 +8v dc grey ribbon cable smps/tsp 3 +8v dc grey ribbon cable smps/tsp 4 no connection grey ribbon cable smps/tsp 5 g...

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    5 mechanical disassembling and module location inmarsat b connector no.: p2 connector type: 2 x 7 pins pin no. Connection name colour to/from 1 +28rv yellow hpa 2 +28rv yellow hpa 3 +28rv yellow hpa 4 ground black hpa 5 +28v orange hpa 6 ground black hpa 7 +12v orange hpa 8 ground black hpa 9 +7.5v ...

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    5 mechanical disassembling and module location inmarsat b connector no.: p5 connector type: 2 x 6 pins pin no. Connection name colour to/from 1 +24v yellow az motor driver 2 ground black az motor driver 3 +5v red not used 4 ground black not used 5 +18v orange up/down converter unit 6 +8v red up/down...

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    5 mechanical disassembling and module location inmarsat b connector no.: p2 connector type: 2 x 3 pins pin no. Connection name colour to/from 1 phase a blue step motor 2 no connection 3 phase b red step motor 4 phase c green step motor 5 no connection 6 phase d black step motor 5.1.3.10 dc motor dri...

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    5 mechanical disassembling and module location inmarsat b 5.1.3.11 tilt sensor part no.: 629366 p1 29366-50 connector no.: p1 connector type: 2 x 4 pins pin no. Connection name colour to/from 1 no connection 2 x output blue tsp 3 y output violet tsp 4 ground black tsp 5 +18v dc orange fluxgate compa...

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    5 mechanical disassembling and module location inmarsat b connector no.: p3 connector type: 2 x 5 pins pin no. Connection name colour to/from 1 +12v dc test point 2 +5v dc test point 3 +18v dc orange smps 4 +8v dc red smps 5 -15.5v dc brown smps 6 ground ground smps 7 compass x output violet tsp 8 c...

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    5 mechanical disassembling and module location inmarsat b 5.2 transceiver unit 5.2.1 module location csp/vdp module lsd/hsd combi modem 629347 630953 pax module 631593 sps module 631531 smi module 631800 32332c page 5-17 9936.

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    5 mechanical disassembling and module location inmarsat b 5.2.2 connectors and software location connectors: connector no.: x1 connector type: micro match, 20 pins pin no. Connection name to/from 1 ground all boards 2 addr0 all boards 3 addr1 all boards 4 addr2 all boards 5 addr3 all boards 6 data0 ...

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    5 mechanical disassembling and module location inmarsat b connector no.: x3 connector type: micro match, 20 pins pin no. Connection name to/from 1 ground sps,hsd,lsd,vdp/csp 2 rclk sps,hsd,lsd,vdp/csp 3 rfs sps,hsd,lsd,vdp/csp 4 rdata sps,hsd,lsd,vdp/csp 5 tclk sps,hsd,lsd,vdp/csp 6 tfs sps,hsd,lsd,...

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    5 mechanical disassembling and module location inmarsat b connector no.: x4 connector type: micro match, 8 pins pin no. Connection name to/from 1 ground smi,csp 2 data+ smi,csp 3 data- smi,csp 4 rxaf+ smi,csp 5 af+ smi,csp 6 rxaf- smi,csp 7 af- smi,csp 8 ground smi,csp connector no.: x5 connector ty...

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    5 mechanical disassembling and module location inmarsat b connector no.: x7 connector type: micro match, 8 pins pin no. Connection name to/from 1 ground csp,pax 2 pax tx clk csp,pax 3 pax tx sync csp,pax 4 pax tx data csp,pax 5 pax rx clk csp,pax 6 pax rx sync csp,pax 7 pax rx data csp,pax 8 ground ...

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    5 mechanical disassembling and module location inmarsat b 5.2.2.1 sps board part no.: 631531 x1 x3 x3a x5 x6 d4 31531-56 software: component no. Description spare part no. D4 receive synchronization 731520 connectors: x1, x3, x3a, x5, x6 5.2.2.2 csp/vdp board part no.: 630953 x2 x1 x3 x4 x5 x6 x7 30...

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    5 mechanical disassembling and module location inmarsat b 5.2.2.3 pax board part no.: 631593 x1 x2 d19 d20 x5 x6 x7 31593-56 software: component no. Description spare part no. D19 phone & fax software 731523 d20 phone & fax software 731522 connectors: x1, x2, x5, x6, x7 5.2.2.4 smi part no.: 731649 ...

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    5 mechanical disassembling and module location inmarsat b 31800d f2 f3 f4 f1 f5 x3 x2 x1 x4 connectors: x1, x2, x3, x4 5.2.2.5 lsd, hsd fpga and combi modem part no.: 629347 29346-56 x1 x3 x5 connectors: x1, x3, x5 hs fpga modem part no.: 633846 33847-56 page 5-24 9936.

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    5 mechanical disassembling and module location inmarsat b page 5-25 9936 combi modem part no.: 629347 29347-56 5.3 handset 5.3.1 software location part no.: 630499 30499-56 d4 component no. Description spare part no. D4 cu software 735158 5.4 control unit 5.4.1 software location part no.: 633769 337...

  • Page 75

    Contents 6 service interface 6-1 6.1 ade 6-2 6.2 alarm 6-4 6.3 book 6-4 6.4 buttons 6-5 6.5 can 6-5 6.6 casc 6-5 6.7 course 6-7 6.8 cu 6-7 6.9 date 6-9 6.10 exit 6-10 6.11 gyro 6-10 6.12 help 6-10 6.13 les 6-11 6.14 log 6-11 6.15 modem 6-12 6.16 numeric 6-13 6.17 pax 6-13 6.18 position 6-14 6.19 pri...

  • Page 76

    Contents inmarsat b 6.25 sps 6-18 6.26 status 6-19 6.27 su 6-20 6.28 test 6-20 6.29 time 6-22 6.30 vdp 6-23 6.31 version 6-23 9936.

  • Page 77

    Page 6-1 inmarsat b 9905 6 service interface the service interface is a useful software tool for both installation and servicing. It provides the technician with detailed information about the system. The service interface is intended for use with a personal computer running a terminal emulation pro...

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    6 service interface inmarsat b page 6-2 9905 longitude as shown, some of the commands have a short-form alias, but the descriptions are in alphabetical order according to the full-length forms. 6.1 ade shows the state of the above deck equipment (ade) or uploads a new program. The following variants...

  • Page 79

    6 service interface inmarsat b transmitter the current channel number (hexadecimal) of the transmitter followed by the current or latest power level and whether or not the high-power amplifier (hpa) is enabled. 6.1.2 ade upload if it is necessary to update the software in the ade, this command may b...

  • Page 80

    6 service interface inmarsat b 6.2 alarm shows the state of the indicator output pins in the alarm connector x35. Syntax alarm 6.2.1 alarm the state of the indicators are listed with a logical number, the connector and pin number, the title and the state on or flash or off. The state on is an active...

  • Page 81

    6 service interface inmarsat b 6.4 buttons shows the state of the distress button input pins in the alarm connector x35. Syntax button[s] 6.4.1 buttons the state of each button is shown as either pressed, released or never pressed. Following the state is the associated device, i.E. Cu extension 2. 6...

  • Page 82

    6 service interface inmarsat b 6.6.1 casc the state of the casc is shown as follows: main state when everything is up and running, this is idle mode. However, other values may occur as follows: reset the initial state at power-on. Casc stays in this state if for some reason the inmarsat forward and ...

  • Page 83

    6 service interface inmarsat b position known indicates whether or not the position is known. Navarea whenever the position is updated, the associated navarea is calculated. 6.7 course shows the current course. Syntax course 6.7.1 course shows the current course in degrees. 6.8 cu shows the state of...

  • Page 85

    6 service interface inmarsat b sounder on or off followed by the virtual volume level in the range 0-255 inclusive. Beeper the virtual volume level in the range 0-255 inclusive. Audio the current audio routing: passive scanbus audio is disabled and the internal sound generator is routed both to the ...

  • Page 86

    6 service interface inmarsat b 6.10 exit ends the service interface. Syntax exit exit ends the interface and restores the interface settings to the defaults (). 6.11 gyro shows the current gyro heading provided through the nmea connector x32 pins 8 and 9. Syntax gyro gyro raw 6.11.1 gyro shows the h...

  • Page 87

    6 service interface inmarsat b 6.13 les shows or changes the list of land earth stations. This command is identical to the ses command. Refer to section 0. 6.14 log shows the call log. Syntax log log count log id number 6.14.1 log shows the latest call log entry. If no call has been logged, this is ...

  • Page 88

    6 service interface inmarsat b distress distress priority. Distress test distress priority test. Ocean region the name of the region. Earth station the access code of the earth station followed by the name, if available. Addressee the service address of called party. Terminal id the number of the te...

  • Page 89

    6 service interface inmarsat b output status of the transmitter section is listed as follows: channel type the current inmarsat return channel type. Key active whether or not the tx key signal is active. Tx inhibit whether or not the transmitter is inhibited by the tx-inhibit input signal. Test enab...

  • Page 91

    6 service interface inmarsat b 6.19.1 printer the following items are listed: open whether or not a print job is currently active. Printing whether or not data is currently being transferred to the printer. Waiting whether or not an active print job is waiting for the printer to become ready. Cts ac...

  • Page 92

    6 service interface inmarsat b 6.21 remark a sequence of command lines may be prepared off-line and downloaded to the service interface. This command may be used to add comments to such a sequence. Syntax rem[ark] [anything] 6.21.1 rem[ark] [anything] does nothing. 6.22 ses shows or changes the list...

  • Page 93

    6 service interface inmarsat b tbd-voice the ses can handle non-standard voice calls. This option is reserved by inmarsat for future use. 6.22.2 ses all region shows all earth stations in the specified region. Refer to the region command (0) to get a list of the available regions. 6.22.3 ses all all...

  • Page 95

    6 service interface inmarsat b ocxo error the precision of the master oscillator in ppm measured by the dsp relative to the received symbol rate. Dsp version the software version of the dsp. Output status of the transmitter section is listed as follows: channel type the current inmarsat return chann...

  • Page 96

    6 service interface inmarsat b position is missing the position has never been entered manually or has been lost from the nmea position input. Region is invalid the current position indicates that the satellite of the current ocean region is below the horizon. Voice communication in progress a voice...

  • Page 97

    6 service interface inmarsat b 4 - target not used warning indicating that the item to be tested is not used. 5 - input static warning indicating that the item to be tested has never been activated, i.E. The cts signal in the printer interface. 6 - wrong state warning indicating that the item to be ...

  • Page 98

    6 service interface inmarsat b tx the transmitter path. 6.28.3 test list runs all primitive tests separately. 6.28.4 test number runs a specific primitive test. 6.28.5 test clear resets the error states memorised by the system, i.E. Battery backup failed. 6.29 time shows or sets the time. Syntax tim...

  • Page 99

    6 service interface inmarsat b 6.29.5 time off shows the time since last power-off in days (if any) hours:minutes:seconds. 6.30 vdp shows state of the voice and data processor on the csp/vdp module. Syntax vdp 6.30.1 vdp if the vdp is not working, this is shown. Otherwise the following is listed: re...

  • Page 100

    Contents 7 trouble shooting 7-1 7.1 battery backup 7-1 7.2 real-time clock 7-1 7.3 eeprom 7-1 7.4 inmarsat ids 7-2 7.5 +15v dc 7-2 7.6 factory reset 7-2 7.7 tx inhibit 7-2 7.8 distress button 1 7-3 7.9 distress button 2 7-3 7.10 telex input 7-3 7.11 printer input 7-4 7.12 ade input 7-4 7.13 nmea pos...

  • Page 101

    Contents inmarsat b 7.25 modem active 7-8 7.26 modem rx su ratio 7-9 7.27 sps found 7-9 7.28 sps rx if 7-9 7.29 sps rx filter 7-9 7.30 sps tx if 7-10 7.31 sps tx filter 7-10 7.32 sps dsp 7-10 7.33 sps ocxo 7-11 7.34 sps rx s/n ratio 7-11 7.35 ade found 7-11 7.36 down converter locked 7-12 7.37 track...

  • Page 102

    Contents inmarsat b 9936 7.51 vdp modem detected 7-17 7.52 vdp clock detected 7-17 7.53 pax found 7-18 7.54 pax running 7-18 7.55 pax phone 1 activity 7-18 7.56 pax phone 2 activity 7-19 7.57 pax phone 1 pabx setting 7-19 7.58 pax phone 2 pabx setting 7-19 7.59 pax phone 1 line noise 7-20 7.60 pax p...

  • Page 103

    Page 7-1 inmarsat b 9849 7 trouble shooting this chapter describes each simple test which can be performed by means of the service interface self- test command test. Each test is associated with a unique number. The test numbers are identical to the number of the sub- paragraph where the test is des...

  • Page 104

    7 trouble shooting inmarsat b page 7-2 9849 7.4 inmarsat ids reports the presence of the inmarsat ids. Result 1 - ok the ids are present. Result 2 - failed the ids are not present. This error is related to the eeprom (refer to 0). 7.5 +15v dc reports the presence of +15v dc on the csp/vdp module. Th...

  • Page 105

    7 trouble shooting inmarsat b page 7-3 result 5 - input static the input has not been active since power-on. Actions - activate the input once. Check x36 or optionally x55. Check the cable w36 inside the tu. 7.8 distress button 1 reports the state of the distress button 1 input, pin 1 in x35. Result...

  • Page 106

    7 trouble shooting inmarsat b actions - check the interface settings of the telex terminal. Result 5 - input static the input has not received anything since power-on. Actions - hit a key on the telex terminal. Check the external connection. Check the cable w2 inside the tu. 7.11 printer input repor...

  • Page 107

    7 trouble shooting inmarsat b 7.13 nmea position input reports the state of the serial nmea position input, pins 1 and 2 in x32 or pins 11 and 12 in x36 or optionally pins 1 and 2 in x54. Result 1 - ok the input has received one or more characters, and the latest was without error. Result 2 - failed...

  • Page 108

    7 trouble shooting inmarsat b actions - check the connection to the gyro repeater x32 or x36. Check the gyro repeater. Check the cables w2 and w36 inside the tu. 7.16 printer on-line reports the state of the printer. Result 1 - ok the printer is ready for printing. Result 2 - failed for inmarsat b s...

  • Page 109

    7 trouble shooting inmarsat b 7.19 ocean region valid checks the selected ocean region against the position. This test is used as an entry to other tests assuming a valid region. Result 1 - ok the satellite for the region can be seen using a valid (positive) antenna elevation. Result 2 - failed the ...

  • Page 110

    7 trouble shooting inmarsat b result 2 - failed no information has been received from any unit. Actions - check that all connected units are working. Check the scanbus cable at x31. Check the cable w4 inside the tu. 7.23 tu bus checks that the internal tu control bus, in the cable w1, is working. Re...

  • Page 111

    7 trouble shooting inmarsat b 7.26 modem rx su ratio checks the current ratio between received good and bad signalling units. Result 1 - ok the ratio is acceptable, i.E. 100%. Result 2 - failed the ratio is not acceptable, i.E. Less than 100%. Actions - refer to the tests for the sps module and the ...

  • Page 112

    7 trouble shooting inmarsat b actions - check the cable w1 inside the tu. Check the 10.08mhz master clock in x3 pin 12. Result 3 - target not found the sps has not been found (refer to 0). 7.30 sps tx if checks the transmitter intermediate frequency synthesizer of the sps. Result 1 - ok the synthesi...

  • Page 113

    7 trouble shooting inmarsat b 7.33 sps ocxo checks the ocxo frequency error relative to the received symbol rate. This measurement is based on calculations made by the sps dsp. Result 1 - ok the ocxo is within range. Result 2 - failed the ocxo is not within range. Actions - adjust the ocxo. Result 3...

  • Page 114

    7 trouble shooting inmarsat b 7.36 down converter locked checks down converter synthesizer of the ade. Result 1 - ok the synthesizer is locked and has been so since power-on. Result 2 - failed the synthesizer has, at one point, been unlocked. This situation is memorised until the command test clear ...

  • Page 115

    7 trouble shooting inmarsat b 7.39 hpa failed checks the high power amplifier of the ade. Result 1 - ok the hpa has not failed since power-on. Result 2 - failed the hpa has, at one point, been unlocked. This situation is memorised until the command test clear is used. Actions - ? Result 3 - target n...

  • Page 116

    7 trouble shooting inmarsat b 7.42 ade ready checks that the ade has aligned the sensors. Result 1 - ok the ade has aligned the sensors. Result 2 - failed the ade has not yet aligned the sensors. Actions - wait until the alignment has finished (approx. 5 minutes). Result 3 - target not found the ade...

  • Page 117

    7 trouble shooting inmarsat b 7.45 ade azimuth rate sensor checks that the ade azimuth rate sensor is working. Result 1 - ok the sensor is working. Result 2 - failed the sensor is not working. Actions - ?. Result 3 - target not found the ade has not been found (refer to 0). Result 6 - wrong state th...

  • Page 118

    7 trouble shooting inmarsat b result 6 - wrong state the ade has not yet aligned the sensors (refer to 0). Actions - wait until the alignment has finished (approx. 5 minutes). 7.48 ade inclinometer checks that the ade inclinometer is working. Result 1 - ok the sensor is working. Result 2 - failed th...

  • Page 119

    7 trouble shooting inmarsat b 7.50 vdp running checks that the voice and data processor on the csp/vdp module pcb1011 is working. Result 1 - ok the vdp is responding to control commands. Result 2 - failed the vdp is not responding. Actions - replace the csp/vdp module pcb1011. 7.51 vdp modem detecte...

  • Page 120

    7 trouble shooting inmarsat b 7.53 pax found checks that the pax is installed by reading a known status over the tubus. The status is read only during power up. Result 1 - ok the pax is found. Result 2 - failed the pax has not been found. Actions - check the cable w1 inside the tu. 7.54 pax running ...

  • Page 121

    7 trouble shooting inmarsat b 7.56 pax phone 2 activity checks that hook-on/off or ringing has been detected for the phone 2 connector x42. Result 1 - ok activity has been detected. Result 3 - target not found the pax has not been found (refer to 5.53). Result 5 - input static activity has not been ...

  • Page 122

    7 trouble shooting inmarsat b 7.59 pax phone 1 line noise checks that the noise level at the phone 1 connector x41 is well below an acceptable maximum limit. This test requires the line to be active (hook-off) but without signalling. Result 1 - ok the level is well below an acceptable maximum limit....

  • Page 123

    7 trouble shooting inmarsat b 7.62 ade failed checks the over-all antenna stabilization mechanism. Result 1 - ok the stabilization mechanism is well and has been so since power-on. Result 2 - failed the stabilization mechanism has, at one point, failed. This situation is memorized until the command ...

  • Page 124

    Contents 8 performance check after repair 8-1 8.1 start-up sequence 8-1 9936 inmarsat b.

  • Page 125

    Page 8-1 inmarsat b 9936 8 performance check after repair 8.1 start-up sequence if the system power has been switched off and then on, the system will step through a start-up sequence as described below. During this sequence the name of each step will be displayed in the handset as indicated. The fi...

  • Page 126

    8 performance check after repair inmarsat b page 8-2 9936 fast search a fast search is performed when the system has been switched off and then on, or when the antenna has been reset. The search will start when the ade is ready, and the position has been received from the gps receiver or from the ke...

  • Page 127

    Contents 9 service 9-1 9.1 check of ocxo 9-1 9936 inmarsat b.

  • Page 128

    Page 9-1 inmarsat b 9936 9 service if a terminal has been installed in the proper way, the maintenance can be reduced to a performance check once a year, depending on the environmental condition. During service inspection, wear of motors and pulley belts, as well as condition of mechanical parts and...

  • Page 129

    Contents 10 parts lists 10-1 9901 inmarsat b.

  • Page 130

    Page 10-1 10 parts lists inmarsat b 9936 handset sc4345 inmarsat b controller eci a/s 80434510 position description manufactor type part no. Misc. Operating instructions sp4400, english hestbech & co. C9931 b4345gb0 sc4350 inmarsat bcontroller 80435000 position description manufactor type part no. M...

  • Page 131

    Page 10-2 9936 base unit st4425c,transc. Dc-voice-telex-fax-hsdata eci a/s 734425 position description manufactor type part no. Misc. Battery holder with plug s-pro 983 785 81c 10780170 misc. Interconnection cable w1 20 pole eci a/s 3-0-31661a 531661 misc. Interconnection cable w2 20 pole eci a/s 3-...

  • Page 132

    10 parts lists inmarsat b position description manufactor type part no. Page 10-3 9936 misc. Fluxgate compass eci a/s 5-0-29369e / 4-0-29369j 2-0-29369 629369 misc. Tsp board eci a/s 5-0-30814g / 4-0-30814k 630814 misc. Bldc motor driver 34686 eci a/s 5-6-34686b / 4-0-34686b 634686 misc. High power ...

  • Page 133

    Contents 11 abbreviations 11-1 inmarsat b 9849.

  • Page 134

    Page 11-1 inmarsat b 9905 11 abbreviations ade above deck equipment agc automatic gain control am amplitude modulation apc adaptive predictive coding bde below deck equipment bjt bipolar junction transistor can controller area network casc control and signalling component csp control and signalling ...