Sailor Inmarsat B Workshop Manual
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Sailor Inmarsat B Workshop Manual

Sailor Inmarsat B Workshop Manual

Sat-b ship earth station
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SAILOR
Inmarsat B
Workshop Manual

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  • Page 1 SAILOR Inmarsat B Workshop Manual...
  • Page 2 Inmarsat B Workshop Manual 9905...
  • Page 3 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 inaccuracies, and represents no commitment whatsoever.

  • Page 4: Table Of Contents

    Inmarsat B CONTENTS INTRODUCTION SYSTEM COMPONENTS TECHNICAL DATA SYSTEM DESCRIPTION ABOVE DECK EQUIPMENT BELOW DECK EQUIPMENT MODULE DESCRIPTION ABOVE DECK EQUIPMENT BELOW DECK EQUIPMENT 3-16 ACCESSORIES SC4350 CONTROL UNIT SD4360 DISTRESS BUTTON H4394/95 VERITAS CONNECTION BOX H4396 T-CONNECTION BOX DISASSEMBLING, CONNECTORS, MODULE AND...
  • Page 5 CONTENTS Inmarsat B 6.24 SPEED 6-18 6.25 6-18 6.26 STATUS 6-19 6.27 6-20 6.28 TEST 6-20 6.29 TIME 6-22 6.30 6-23 6.31 VERSION 6-23 TROUBLE SHOOTING BATTERY BACKUP REAL-TIME CLOCK EEPROM INMARSAT IDs +15V DC FACTORY RESET TX INHIBIT DISTRESS BUTTON 1 DISTRESS BUTTON 2 7.10...
  • Page 6 CONTENTS Inmarsat B 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...

  • Page 7: Introduction

    Inmarsat B CONTENTS INTRODUCTION SYSTEM COMPONENTS TECHNICAL DATA 9849...
  • Page 8 Inmarsat B 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.

  • Page 9: System Components

    1 INTRODUCTION Inmarsat B 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 pointing the antenna towards the satellite independent of the motion of the ship.
  • Page 10 1 INTRODUCTION Inmarsat B Inmarsat B SA4415 SAT-B Antenna ABOVE DECK BELOW DECK SC4345 SAT-B Transceiver Control Handset ST4425C All Control Handsets SC4345 can be replaced by Control Unit SAT-B TRANSCEIVER S.P. RADIO DENMARK SC4350 and vice versa. Transceiver ST4425 Power Cable DC 24V...

  • Page 11: Technical Data

    G/T = -4 dB/K. 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 Modulation: TX 24,132 kbit/s O-QPSK GMDSS requirements. RX 6 kbit/s BPSK, 24/132 kbit/s O-QPSK.

  • Page 12: System Description

    Inmarsat B CONTENTS SYSTEM DESCRIPTION ABOVE DECK EQUIPMENT 2.1.1 PRINCIPLE OF STABILISATION 2.1.2 COMPONENTS OF THE STABILISATION SYSTEM 2.1.3 ANTENNA BEHAVIOUR DURING START-UP SEQUENCE 2.1.4 ANTENNA BEHAVIOUR DURING GLOBAL SEARCH 2.1.5 ANTENNA BEHAVIOUR DURING REGION SHIFT SEARCH 2.1.6 TRACKING ALGORITHM 2.1.7...

  • Page 13: Above Deck Equipment

    Inmarsat B 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.

  • Page 14: Principle Of Stabilisation

    2 SYSTEM DESCRIPTION Inmarsat B 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 the transceiver unit is processed by a microcontroller placed on the tracking and stabilisation processor board, which also takes care of data in the opposite direction.

  • Page 15: Components Of The Stabilisation System

    2 SYSTEM DESCRIPTION Inmarsat B 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 horizontal axis holding a small sensor box.

  • Page 16: Antenna Behaviour During Start-Up Sequence

    2 SYSTEM DESCRIPTION Inmarsat B 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 chapter.

  • Page 17: Tracking Algorithm

    2 SYSTEM DESCRIPTION Inmarsat B 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 point 15°...

  • Page 18: Below Deck Equipment

    2 SYSTEM 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. SMPS Modem CSP/VDP 35974 Fig. 2.3. SPS board The SPS (signal path and synthesizer) board is the interface between the analogue RF parts at the antenna unit and the digital signal processing in the transceiver unit.
  • Page 19 2 SYSTEM DESCRIPTION Inmarsat B 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 single terminal or a local network at transmission rates of 9.6 or 64 kbit/s (64 kbit/s only possible if high speed data is implemented).

  • Page 20: Module Description

    Inmarsat B CONTENTS MODULE DESCRIPTION ABOVE DECK EQUIPMENT 3.1.1 ANTENNA 3.1.2 DIPLEXER 3.1.3 3.1.4 DOWN CONVERTER 3.1.5 UP CONVERTER 3.1.6 3.1.7 TRACKING RECEIVER 3.1.8 TRIPLEXER 3.1.9 SYNTHESIZER FOR TRACKING RECEIVER 3.1.10 SYNTHESIZER FOR UP/DOWN CONVERTER 3-10 3.1.11 SWITCH MODE POWER SUPPLY 3-13 3.1.12...

  • Page 21: Above Deck Equipment

    Inmarsat B 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. ABOVE DECK EQUIPMENT 3.1.1 ANTENNA The antenna is a parabolic dish antenna as shown in fig. 3.1.

  • Page 22: Diplexer

    3 MODULE DESCRIPTION Inmarsat B 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 used, i.e.

  • Page 23: Down Converter

    3 MODULE 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. Filter Module 10 kHz 20 kHz 21.4 MHz...

  • Page 24: Up Converter

    3 MODULE 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. Input from Triplexer Output to HPA 62.9 MHz 150 MHz 150 MHz 1636.5...

  • Page 25: Tracking Receiver

    3 MODULE DESCRIPTION Inmarsat B 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 the different digital modulation forms used.

  • Page 26: Triplexer

    3 MODULE DESCRIPTION Inmarsat B 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 has fixed and the second variable gain controlled by a DC voltage.
  • Page 27 3 MODULE DESCRIPTION Inmarsat B 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.

  • Page 28: Synthesizer For Tracking Receiver

    3 MODULE DESCRIPTION Inmarsat B 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 synthesizer and the other is called VHF synthesizer.
  • Page 29 3 MODULE DESCRIPTION Inmarsat B 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 divider to obtain a frequency resolution of 315 kHz.

  • Page 30: Synthesizer For Up/Down Converter

    3 MODULE DESCRIPTION Inmarsat B 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 synthesizer module. The first local oscillator which is used to mix the transmitter frequency to first IF is named VHF synthesizer and the other is named L-band synthesizer.
  • Page 31 3 MODULE DESCRIPTION Inmarsat B 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 from the triplexer board.
  • Page 32 3 MODULE DESCRIPTION Inmarsat B L Band :64/65 :20/21 LOOP 1 :20/21 LOOP 2 10.08 MHz from Triplexer To TSP Lock Signals Lock det. from PLL 35534 Fig. 3.11. L-band synthesizer The L-band oscillator is based on a voltage controlled oscillator (VCO) with good close in phase noise properties.

  • Page 33: Switch Mode Power Supply

    3 MODULE 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.

  • Page 34: Tsp

    3 MODULE 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 kHz respectively. The signals are used to refresh a timer and if one is missing, the adjustable voltage, and thus the transmitter signal, are shut down.

  • Page 35: Tilt Sensor

    3 MODULE 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.

  • Page 36: Below Deck Equipment

    3 MODULE 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 processor for carrier and clock synchronisation.
  • Page 37 3 MODULE 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.

  • Page 38: Modem Board

    3 MODULE 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 types. It handles LSD as well as HSD, and TX as well as RX.

  • Page 39: Csp/Vdp Board

    3 MODULE 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 equipment interfaces.

  • Page 40: Pax Board

    3 MODULE 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 able to run on 186 code.

  • Page 41: Smi Board

    3 MODULE 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 diagram is shown in fig. 3.2.5.

  • Page 42: Handset

    3 MODULE 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 43: Accessories

    Inmarsat B CONTENTS ACCESSORIES SC4350 CONTROL UNIT SD4360 DISTRESS BUTTON H4394/95 VERITAS CONNECTION BOX H4396 T-CONNECTION BOX 9849...

  • Page 44: Sc4350 Control Unit

    Inmarsat B 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.

  • Page 45: H4394/95 Veritas Connection Box

    4 ACCESSORIES Inmarsat B 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 the alarm connector.
  • Page 46 4 ACCESSORIES Inmarsat B Inmarsat B Diagram Veritas connection box 9849 PAGE 4-3...

  • Page 47: H4396 T-Connection Box

    4 ACCESSORIES Inmarsat B 4.4 H4396 T-CONNECTION BOX Diagram T-Connection box Component location T-Connection box PAGE 4-4 9901...

  • Page 48: Disassembling, Connectors, Module And Software Location

    Inmarsat B CONTENTS DISASSEMBLING, CONNECTORS, MODULE AND SOFTWARE LOCATION ANTENNA UNIT 5.1.1 MODULE AND SENSOR LOCATION 5.1.2 MECHANICAL DISASSEMBLING 5.1.2.1 CHANGING AZIMUTH TIMING BELT 5.1.2.2 CHANGING ELEVATION TIMING BELT 5.1.2.3 CHANGING CROSS ELEVATION TIMING BELT 5.1.2.4 CHANGING HORIZONTAL AXIS TIMING BELT 5.1.3...
  • Page 49 CONTENTS Inmarsat B 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 5-23 5.2.2.5 LSD, HSD FPGA AND COMBI MODEM 5-24 HANDSET 5-25 5.3.1 SOFTWARE LOCATION 5-25 CONTROL UNIT 5-25 5.4.1...

  • Page 50: Antenna Unit

    Inmarsat B DISASSEMBLING, CONNECTORS, MODULE AND SOFTWARE LOCATION ANTENNA UNIT 5.1.1 MODULE AND SENSOR LOCATION Fig. 5.1 Fig. 5.2 Fig. 5.3 Tracking receiver unit part no. 729840 Up/down converter unit part no. 730650 ADE on/off switch part no. 729430 Connection board part no.

  • Page 51: Mechanical Disassembling

    5 MECHANICAL DISASSEMBLING AND MODULE LOCATION Scansat-B 5.1.2 MECHANICAL DISASSEMBLING 5.1.2.2 CHANGING ELEVATION TIMING BELT 5.1.2.3 CHANGING CROSS ELEVATION TIMING BELT 5.1.2.1 CHANGING AZIMUTH TIMING BELT part no. 48.852 part no. 48.853 part no. 736889 part no. 736888 § § §...

  • Page 52: Changing Horizontal Axis Timing Belt

    5 MECHANICAL DISASSEMBLING AND MODULE LOCATION Inmarsat B 5.1.2.4 CHANGING HORIZONTAL AXIS TIMING BELT part no. 48.855 part no. 736891 Fig. 5.7 Loosen the four screws holding the motor part no. 86.962 Loosen one 5 mm bolt, part no. 87.421 and remove the horizontal axis Change the timing belt.

  • Page 53: Connectors And Software Location

    5 MECHANICAL DISASSEMBLING AND MODULE LOCATION Inmarsat B 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 62.9 MHz input to up converter...

  • Page 54: Tracking Receiver Unit

    5 MECHANICAL DISASSEMBLING AND MODULE LOCATION Inmarsat B 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 L-band input to tracking receiver Diplexer/LNA unit 10.08 MHz reference to synthesiser Triplexer Connector no.:...

  • Page 55: Hpa

    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 Output from HPA Diplexer Input to HPA Up converter Connector no.: Connector type: Molex, 2 X 10 pins Pin no.

  • Page 56: Diplexer/Lna

    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 LNA output Down converter LNA output Tracking receiver Diplexer input/output Antenna Diplexer input, Tx 5.1.3.5 TSP...
  • Page 57 5 MECHANICAL DISASSEMBLING AND MODULE LOCATION Inmarsat B Software: Component no. Description Spare part no. Tracking & stabilisation 732514 Tracking & stabilisation 732515 Connections: Connector no.: Connector type: 3M, 2 x 5 pins Pin no. Connection name Colour To/from +18V...
  • Page 58 5 MECHANICAL DISASSEMBLING AND MODULE LOCATION Inmarsat B Connector no.: Connector type: MOLEX, 2 x 3 pins Pin no. Connection name Colour To/from HPA_SEL Green HPA_READ_REQ Blue HPA_DATA_CLOCK Violet HPA_DATA_TO_HPA Grey HPA_DATA_FROM_HPA White Ground Black Connector no.: Connector type: MOLEX, 2 x 20 pins Pin no.

  • Page 59: Triplexer

    5 MECHANICAL DISASSEMBLING AND MODULE LOCATION Inmarsat B Connector no.: Connector type: MOLEX, 2 x 5 pins Pin no. Connection name Colour To/from AZ_PHASE_A Green Step motor driver, Az Ground Black Step motor driver, Az AZ_PHASE_B Blue Step motor driver, Az...

  • Page 60: Smps

    5 MECHANICAL DISASSEMBLING AND MODULE LOCATION Inmarsat B Connector no.: Connector type: 3M, 2 x5 pins Pin no. Connection name Colour To/from +18V DC Grey ribbon cable SMPS/Tsp +8V DC Grey ribbon cable SMPS/Tsp +8V DC Grey ribbon cable SMPS/Tsp...
  • Page 61 5 MECHANICAL DISASSEMBLING AND MODULE LOCATION Inmarsat B Connector no.: Connector type: 2 x 7 pins Pin no. Connection name Colour To/from +28RV Yellow +28RV Yellow +28RV Yellow Ground Black +28V Orange Ground Black +12V Orange Ground Black +7.5V No connection...

  • Page 62: Step Motor Driver

    5 MECHANICAL DISASSEMBLING AND MODULE LOCATION Inmarsat B Connector no.: Connector type: 2 x 6 pins Pin no. Connection name Colour To/from +24V Yellow AZ motor driver Ground Black AZ motor driver Not used Ground Black Not used +18V Orange...

  • Page 63: Dc Motor Driver

    5 MECHANICAL DISASSEMBLING AND MODULE LOCATION Inmarsat B Connector no.: Connector type: 2 x 3 pins Pin no. Connection name Colour To/from Phase A Blue Step motor No connection Phase B Step motor Phase C Green Step motor No connection...

  • Page 64: Tilt Sensor

    5 MECHANICAL DISASSEMBLING AND MODULE LOCATION Inmarsat B 5.1.3.11 TILT SENSOR PART no.: 629366 29366-50 Connector no.: Connector type: 2 x 4 pins Pin no. Connection name Colour To/from No connection X output Blue Y output Violet Ground Black +18V DC...

  • Page 65: Zero-Mark Detector

    5 MECHANICAL DISASSEMBLING AND MODULE LOCATION Inmarsat B Connector no.: Connector type: 2 x 5 pins Pin no. Connection name Colour To/from +12V DC Test point +5V DC Test point +18V DC Orange SMPS +8V DC SMPS -15.5V DC Brown...

  • Page 66: Transceiver Unit

    5 MECHANICAL DISASSEMBLING AND MODULE LOCATION Inmarsat B 5.2 TRANSCEIVER UNIT 5.2.1 MODULE LOCATION P / V D / H 6 3 0 9 5 3 6 2 9 3 4 7 6 3 1 5 9 3 6 3 1...

  • Page 67: Connectors And Software Location

    5 MECHANICAL DISASSEMBLING AND MODULE LOCATION Inmarsat B 5.2.2 CONNECTORS AND SOFTWARE LOCATION Connectors: Connector no.: Connector type: Micro match, 20 pins Pin no. Connection name To/from Ground ALL boards ADDR0 ALL boards ADDR1 ALL boards ADDR2 ALL boards ADDR3...
  • Page 68 5 MECHANICAL DISASSEMBLING AND MODULE LOCATION Inmarsat B Connector no.: Connector type: Micro match, 20 pins Pin no. Connection name To/from Ground SPS,HSD,LSD,VDP/CSP RCLK SPS,HSD,LSD,VDP/CSP SPS,HSD,LSD,VDP/CSP RDATA SPS,HSD,LSD,VDP/CSP TCLK SPS,HSD,LSD,VDP/CSP SPS,HSD,LSD,VDP/CSP TDATA SPS,HSD,LSD,VDP/CSP RX SIGNAL SPS,HSD,LSD,VDP/CSP TX KEY SPS,HSD,LSD,VDP/CSP MODEM CHANGE...
  • Page 69 5 MECHANICAL DISASSEMBLING AND MODULE LOCATION Inmarsat B Connector no.: Connector type: Micro match, 8 pins Pin no. Connection name To/from Ground SMI,CSP DATA+ SMI,CSP DATA- SMI,CSP RXAF+ SMI,CSP SMI,CSP RXAF- SMI,CSP SMI,CSP Ground SMI,CSP Connector no.: Connector type: Micro match, 20 pins Pin no.
  • Page 70 5 MECHANICAL DISASSEMBLING AND MODULE LOCATION Inmarsat B Connector no.: Connector type: Micro match, 8 pins Pin no. Connection name To/from Ground CSP,PAX PAX TX CLK CSP,PAX PAX TX SYNC CSP,PAX PAX TX DATA CSP,PAX PAX RX CLK CSP,PAX PAX RX SYNC...

  • Page 71: Sps Board

    5 MECHANICAL DISASSEMBLING AND MODULE LOCATION Inmarsat B 5.2.2.1 SPS BOARD PART no.: 631531 31531-56 Software: Component no. Description Spare part no. Receive Synchronization 731520 Connectors: X1, X3, X3A, X5, X6 5.2.2.2 CSP/VDP BOARD PART no.: 630953 30953-56 Software: Component no. Description Spare part no.

  • Page 72: Pax Board

    5 MECHANICAL DISASSEMBLING AND MODULE LOCATION Inmarsat B 5.2.2.3 PAX BOARD PART no.: 631593 31593-56 Software: Component no. Description Spare part no. Phone & Fax Software 731523 Phone & Fax Software 731522 Connectors: X1, X2, X5, X6, X7 5.2.2.4 SMI PART no.: 731649...

  • Page 73: Lsd, Hsd Fpga And Combi Modem

    5 MECHANICAL DISASSEMBLING AND MODULE LOCATION Inmarsat B 31800D Connectors: X1, X2, X3, X4 5.2.2.5 LSD, HSD FPGA AND COMBI MODEM PART no.: 629347 29346-56 Connectors: X1, X3, X5 HS FPGA MODEM PART no.: 633846 33847-56 PAGE 5-24 9936...

  • Page 74: Handset

    5 MECHANICAL DISASSEMBLING AND MODULE LOCATION Inmarsat B COMBI MODEM PART no.: 629347 29347-56 5.3 HANDSET 5.3.1 SOFTWARE LOCATION PART no.: 630499 30499-56 Component no. Description Spare part no. CU Software 735158 5.4 CONTROL UNIT 5.4.1 SOFTWARE LOCATION PART no.: 633769 33769-56 Component no.
  • Page 75 Inmarsat B CONTENTS SERVICE INTERFACE ALARM BOOK BUTTONS CASC COURSE DATE 6.10 EXIT 6-10 6.11 GYRO 6-10 6.12 HELP 6-10 6.13 6-11 6.14 6-11 6.15 MODEM 6-12 6.16 NUMERIC 6-13 6.17 6-13 6.18 POSITION 6-14 6.19 PRINTER 6-14 6.20 REGION 6-15 6.21...
  • Page 76 CONTENTS Inmarsat B 6.25 6-18 6.26 STATUS 6-19 6.27 6-20 6.28 TEST 6-20 6.29 TIME 6-22 6.30 6-23 6.31 VERSION 6-23 9936...

  • Page 77: Service Interface

    Inmarsat B 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 program like PROCOMM.

  • Page 78: Ade

    6 SERVICE INTERFACE Inmarsat B 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 be used to transfer a program file from a disk directly to the FLASH memory of the controller on the TSP board.

  • Page 80: Alarm

    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 .

  • Page 81: Buttons

    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.

  • Page 82: Casc

    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 return IDs are invalid.

  • Page 83: Course

    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.
  • Page 84 6 SERVICE INTERFACE Inmarsat B 6.8.2 CU SC4345|SC4346 Shows the state of all control units of a specific hardware type. Refer to 0 for details. 6.8.3 CU EXTENSION Shows the detailed state of a specific control unit with the specified local extension in the Inmarsat system.

  • Page 85: Date

    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 earpiece and speaker.

  • Page 86: Exit

    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.

  • Page 87: Les

    The type of service used, which is one of the following possibilities: voice Inmarsat B standard voice. voice 9k6 Inmarsat B voice at 9600 bps. Reserved by Inmarsat and not currently used. Inmarsat B standard fax. data 9k6 Inmarsat B data at 9600 bps.

  • Page 88: Modem

    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.

  • Page 89: Numeric

    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.

  • Page 90: Position

    6 SERVICE INTERFACE Inmarsat B 6.18 POSITION Shows or sets the current global position. Syntax POS[ITION] POS[ITION] latitude N[ORTH]|S[OUTH] longitude E[AST]|W[EST] POS[ITION] AUTO POS[ITION] AUTO ON|OFF POS[ITION] RAW 6.18.1 POSITION Shows the current position and input source. 6.18.2 POSITION LATITUDE N[ORTH]|S[OUTH] LONGITUDE E[AST]|W[EST] Sets the position manually.

  • Page 91: Region

    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.

  • Page 92: Remark

    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.

  • Page 93: Snu

    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.

  • Page 94: Speed

    6 SERVICE INTERFACE Inmarsat B 6.23.1 SNU [ALL] Shows the state of all node units. 6.23.2 SNU 0|1|2|3 Shows the state of a specific node unit. 6.24 SPEED Shows the current speed. Syntax SPEED 6.24.1 SPEED Shows the current speed in knots.

  • Page 95: Status

    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 channel type.

  • Page 96: Test

    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.
  • 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.

  • Page 98: Time

    6 SERVICE INTERFACE Inmarsat B 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.

  • Page 99: Vdp

    Inmarsat B fax. data-9k6 Inmarsat B standard data. data-16k Inmarsat B optional data. data-56k Inmarsat B derated high-speed data. data-64k Inmarsat B high-speed data. Transmission The current transmission mode of operation. The possible modes are identical to those listed for reception.
  • Page 100 Inmarsat B CONTENTS TROUBLE SHOOTING BATTERY BACKUP REAL-TIME CLOCK EEPROM INMARSAT IDs +15V DC FACTORY RESET TX INHIBIT DISTRESS BUTTON 1 DISTRESS BUTTON 2 7.10 TELEX INPUT 7.11 PRINTER INPUT 7.12 ADE INPUT 7.13 NMEA POSITION INPUT 7.14 SERVICE INPUT 7.15...
  • Page 101 CONTENTS Inmarsat B 7.25 MODEM ACTIVE 7.26 MODEM RX SU RATIO 7.27 SPS FOUND 7.28 SPS RX IF 7.29 SPS RX FILTER 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...
  • Page 102 CONTENTS Inmarsat B 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...

  • Page 103: Battery Backup

    Inmarsat B 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 described;...

  • Page 104: Inmarsat Ids

    7 TROUBLE SHOOTING Inmarsat B 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).

  • Page 105: Distress Button

    7 TROUBLE SHOOTING Inmarsat B 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.

  • Page 106: Printer Input

    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.

  • Page 107: Nmea Position Input

    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.

  • Page 108: Printer On-Line

    Result 1 - OK The printer is ready for printing. Result 2 - FAILED For Inmarsat B systems this is the only alternative result. Actions - Check that the printer is switched on. Check that the printer has been switched on-line.

  • Page 109: Ocean Region Valid

    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.

  • Page 110: Tu Bus

    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.

  • Page 111: Modem Rx Su Ratio

    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%.

  • Page 112: Sps Tx If

    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.

  • Page 113: Sps Ocxo

    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.

  • Page 114: Down Converter Locked

    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 is used.

  • Page 115: Hpa Failed

    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.

  • Page 116: Ade Ready

    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.

  • Page 117: Ade Azimuth Rate Sensor

    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).

  • Page 118: Ade Inclinometer

    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.

  • Page 119: Vdp Running

    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.

  • Page 120: Pax Found

    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.

  • Page 121: Pax Phone 2 Activity

    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).

  • Page 122: Pax Phone 1 Line Noise

    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.

  • Page 123: Ade Failed

    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 TEST CLEAR is used (refer to 4.33.6).

  • Page 124: Performance Check After Repair

    Inmarsat B CONTENTS PERFORMANCE CHECK AFTER REPAIR START-UP SEQUENCE 9936...

  • Page 125: Start-Up Sequence

    Inmarsat B 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.
  • Page 126 8 PERFORMANCE CHECK AFTER REPAIR Inmarsat B 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 keypad.

  • Page 127: Service

    Inmarsat B CONTENTS SERVICE CHECK OF OCXO 9936...

  • Page 128: Check Of Ocxo

    Inmarsat B 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 cables are checked.

  • Page 129: Parts Lists

    Inmarsat B CONTENTS PARTS LISTS 10-1 9901...
  • Page 130 USER’S GUIDE INMARSAT B DATA SERVICES Hestbech & Co. C9936 60.243 MISC. SP4400 INSTALLATION REFERENCE Hestbech & Co. C9931 M4400GB UP/DOWN CONVERTER UNIT INMARSAT B, ADE, SA4415 ECI A/S 730650 POSITION DESCRIPTION MANUFACTOR TYPE PART NO. MISC. INTERCONNECTION CABLE 4 POLES L=180MM...
  • Page 131 MISC. BLOWER UNIT ACO-PLAST A/S 0-0-33974 733974 MISC. SCREW M3x10 PHRX A2 HFC 1877 M3x10 PHRX-A2 DIN 7985 86.964 TRACKING RECEIVER UNIT INMARSAT B, ADE, SA4215 ECI A/S 729840 POSITION DESCRIPTION MANUFACTOR TYPE PART NO. MISC. INTERCONNECTION CABLE 6 POLES L=180MM...
  • Page 132 10 PARTS LISTS Inmarsat B POSITION DESCRIPTION MANUFACTOR TYPE PART NO. 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.

  • Page 133: Abbreviations

    Inmarsat B CONTENTS ABBREVIATIONS 11-1 9849...
  • Page 134 Inmarsat B ABBREVIATIONS Above deck equipment Automatic gain control Amplitude modulation Adaptive predictive coding Below deck equipment Bipolar junction transistor Controller area network CASC Control and signalling component Control and signalling processor Control unit Dead man's button Frequency shift keying...

This manual is also suitable for:

Sc4350Sa4415St4425 bSp4360St4425 cSc4345

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