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LD2103 V2.8 Page 2 of 36 SRT Marine Instruction Manual SRT-MTB© Class B Marine AIS Table of contents Table of contents ............................................................................................................................................................................2 General Warnings .......................................................................................................................................................................4 Licensing.....................
LD2103 V2.8 Page 3 of 36 SRT Marine Instruction Manual SRT-MTB© Class B Marine AIS VHF Data Link Messages (NMEA 0183 VDM)..........................................................................................................................18 VHF Data Link Own Vessel Messages (NMEA 0183 VDO)......................................................................................................19 Regional Assignment Channel Assignment Message (NMEA 0183 ACA)................................................
LD2103 V2.8 Page 4 of 36 SRT Marine Instruction Manual SRT-MTB© Class B Marine AIS General Warnings All marine Automatic Identification System (AIS) units utilise a satellite based system such as the Global Positioning Satellite (GPS) network or the Global Navigation Satellite System (GLONASS) network to determine position.
LD2103 V2.8 Page 5 of 36 SRT Marine Instruction Manual SRT-MTB© Class B Marine AIS Licensing IMPORTANT: In most countries the operation of an AIS unit is included under the vessel's marine VHF licence provisions. The vessel on to which the AIS unit is to installed must therefore possess a current VHF radiotelephone licence which lists the AIS system and the vessel Call Sign and MMSI number. Please contact the relevant authority in your country for more information.
LD2103 V2.8 Page 6 of 36 SRT Marine Instruction Manual SRT-MTB© Class B Marine AIS Product Specification Parameter Value Dimensions 190 x 135 x 83 mm (L x W x H) Weight 1450g Power DC (9.6-15.6V) Average power consumption 4W Peak current rating 2A GPS Receiver (AIS Internal) IEC 61108-1 compliant Electrical Interfaces RS232 38.4kBaud bi-directional RS422 NMEA 38.
LD2103 V2.8 Page 7 of 36 SRT Marine Instruction Manual SRT-MTB© Class B Marine AIS Parameter Value Indicators Power, TX timeout, status, pre-set SRM sent. Operator Controls Optional pre-set safety related message (SRM) transmit button Standards This product complies to all the necessary standards under the European R&TTE directive for Article 3.1(a), 3.1(b), 3.2 and 3.3(e).
LD2103 V2.8 Page 8 of 36 SRT Marine Instruction Manual SRT-MTB© Class B Marine AIS Introduction How AIS Works The marine Automatic Identification System (AIS) is a location and vessel information reporting system. It allows vessels equipped with AIS to automatically and dynamically share and regularly update their position, speed, course and other information such as vessel identity with similarly equipped craft.
LD2103 V2.8 Page 9 of 36 SRT Marine Instruction Manual SRT-MTB© Class B Marine AIS Installing the SRT-MTB unit WARNING: Do not connect the SRT-MTB unit to a mains (line) AC electrical supply, as an electric shock or fire hazard could result. CAUTION: Do not connect the SRT-MTB unit to a DC supply exceeding 15.6 V or reverse the supply polarity. Damage to the unit may result. CAUTION: The SRT-MTB unit is designed for operation in the temperature range -25 °C to +55 °C.
LD2103 V2.8 Page 10 of 36 SRT Marine Instruction Manual SRT-MTB© Class B Marine AIS If an external display unit is to be used (such as a chart plotter, PC serial terminal or other display device) connect the user end of the data interface cable to the display device. Note that the software in the display device must be configured for AIS operation AND to accept standard Class B operation NMEA sentences. This external display unit software is not part of the SRT-MTB transponder package.
LD2103 V2.8 Page 11 of 36 SRT Marine Instruction Manual SRT-MTB© Class B Marine AIS Programming the transponder Field Programmer Before the SRT-MTB can be used it requires ‘personalisation’. This is done via the SRT-MTB proAIS package which is supplied as an accessory. This software is designed to be installed on a PC and to use the data lead provided as standard with the SRT-MTB unit.
LD2103 V2.8 Page 12 of 36 SRT Marine Instruction Manual SRT-MTB© Class B Marine AIS Other features Help There is a context based Help file which explains what each data entry field means and what sort of data is expected. Help is accessible via the dealer and engineer passwords. Print The programmer will print out the information ‘Read’ from or ‘Written’ to an SRT-MTB Class B unit.
LD2103 V2.8 Page 13 of 36 SRT Marine Instruction Manual SRT-MTB© Class B Marine AIS Using the transponder Switching on SRM SAFETY RELATED MESSAGE When the 12V supply is switched on all four LEDs visible on the front panel of the unit will illuminate twice for a period of one second on each illumination. The red and blue LEDs will then go out.
LD2103 V2.8 Page 14 of 36 SRT Marine Instruction Manual SRT-MTB© Class B Marine AIS The data port will accept the following inputs: • Programming information • Alarm acknowledgements Please see the ‘Data Interface’ section of this manual for more details of the data port messages. When in operation an AIS unit: • Uses one of two VHF channels within the international marine band allocation (channel 87B; 161.975MHz, or channel 88B; 162.
LD2103 V2.8 Page 15 of 36 SRT Marine Instruction Manual SRT-MTB© Class B Marine AIS LED Indicators Power This is a green LED which indicates, when lit, that power has been connected correctly to the transponder, that the transponder hardware has been configured, that the operating software is present, that the CPU has booted up, the application software is running. TX Timeout This is a yellow LED which indicates when lit that the CSTDMA transmitter is prevented from transmitting.
LD2103 V2.8 Page 16 of 36 SRT Marine Instruction Manual SRT-MTB© Class B Marine AIS Maintenance WARNING: Unauthorised opening of the SRT-MTB system will invalidate the warranty. CAUTION: Avoid using chemical solvents to clean the SRT-MTB as some solvents can damage the case material. NOTE: The SRT-MTB contains no user serviceable parts. Contact your Service Agent for repair if replacing the fuse fails to make the equipment serviceable.
LD2103 V2.8 Page 17 of 36 SRT Marine Instruction Manual SRT-MTB© Class B Marine AIS Serial Data Interface Power Connection / Data Connection There is a 15-way D-type male connector mounted under the transponder top cover. The standard data or power and data cable assembly provided mates with this connector. Power 12V DC (9.6-15.6V) is connected to the transponder power supply input via the cable assembly LD1873.
LD2103 V2.8 Page 18 of 36 SRT Marine Instruction Manual SRT-MTB© Class B Marine AIS Power up messages On power up the unit will report details of the firmware versions residing in the unit. VHF data link messages (NMEA 0183 VDM) Receipt of a VHF Data Link (VDL) message on either AIS radio channel causes a VDM message to be output via the data port. Please see IEC 61193-2, Annex B for a list of messages.
LD2103 V2.8 Page 19 of 36 SRT Marine Instruction Manual SRT-MTB© Class B Marine AIS VDL Message number VDM Message description System control 7 binary acknowledge (INFO) 10 UTC and data inquiry (INFO) 11 UTC and data response (INFO) 13 safety related ack (INFO) 15 interrogation (INFO) 16 assignment mode command (INFO) 17 DGNSS corrections (INFO) 20 data link management (INFO) 22 channel management (INFO) *Note that messages 5 and 19 may be sent as multi part messages.
LD2103 V2.8 Page 20 of 36 SRT Marine Instruction Manual SRT-MTB© Class B Marine AIS Regional Assignment Channel Assignment Message (NMEA 0183 ACA) An SRT-MTB unit can receive regional channel management information in two ways: ITU-R M.1371 message 22 or a DSC telecommand received on channel 70, ACA Message Format $--ACA,x,llll.ll,a,yyyyy.yy,a,llll.ll,a1,y1y1y1y1y.y1y1,a2,x1,x2x2x2x2,x3,x4x4x4x4,x5,x6,x7,a3,x8,hhmmss.
LD2103 V2.8 Page 21 of 36 SRT Marine Instruction Manual SRT-MTB© Class B Marine AIS • xxxx = UTC Year AIS Alarm Messages (NMEA 0183 ALR, Text) ALR message format $--ALR,hhmmss.ss,xxx,A,A,c--c*hh Where • hhmmss.
LD2103 V2.8 Page 22 of 36 SRT Marine Instruction Manual SRT-MTB© Class B Marine AIS Antenna connections GPS Antenna This is a TNC female bulkhead connector mounted under the unit top cover. This port provides the 5V DC feed for the active GPS antenna required by the SRT-MTB unit. VHF Antenna This is a BNC female bulkhead connector mounted under the unit top cover. Antenna types and mounting Please see Appendix A for antenna details.
LD2103 V2.8 Page 23 of 36 SRT Marine Instruction Manual SRT-MTB© Class B Marine AIS Drawings Packing list REVISION HISTORY REV 1 2 DESCRIPTION DATE PRODUCTION RELEASE MAGNET PACK REMOVED APPROVED 23/2/06 15/6/06 THIRD ANGLE PROJECTION 7 5 8 9 10 2 1 3 ITEM 5 DESCRIPTION QTY LD2095 AIS CLASS B TRANSPONDER UNIT 2 NA POLYTHENE BAG 300 x 300 mm 1 3 NA SILICA GEL SACHET 1 4 LD2098 OUTER PACKING CARTON 1 5 LD2099 INNER PACKING (2 ITEMS) 1 6 11 SRT PARTNo.
LD2103 V2.8 Page 24 of 36 SRT Marine Instruction Manual SRT-MTB© Class B Marine AIS Fixing Template (NOT TO SCALE) REVISION HISTORY REV DESCRIPTION DATE APPROVED MOUNTING HOLES IN BASE PLATE ARE O5.5 TO SUITM5 SCREWS 100,0 MOUNTING HOLE FIXING CENTRES TEMPLATE FRONTOF UNIT 160,0 NAME DATE M.KENDALL 24/2/06 DRAWN CHECKED SOFTWARE RADIO TECHNOLOGY PLC WESTFIELD INDUSTRIAL ESTATE MIDSOMER NORTON, BATH, UK.
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LD2103 V2.8 Page 26 of 36 SRT Marine Instruction Manual SRT-MTB© Class B Marine AIS Mechanical Breakdown REVI SION HISTORY DESCRIPTIO N DAT E 1 THIRD ANGLE PROJEC TION 12 8 8 7 14 8 2 3 20 18 4 19 (COMPONENTS NOT SHOWN) 24 REFER TO NOTE 16 6 REFER TO NOTE 17 6 NA = NO T APPLICABLE 15 6 25 5 THIS DRAWING SHOWS TWO BUILD VARIANTS. 1. FITTED WITH MEMBRANE ALERT SWITCH PANEL - USE ITEM 24. 2. NO ALERT SWITCH FITTED - USE ITEM 25.
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LD2103 V2.8 Page 30 of 36 SRT Marine Instruction Manual SRT-MTB© Class B Marine AIS Block Schematics – Radio Frequency Block Diagram 2nd AIS Receiver SAW Filter x3 Mixer IF Amp 26MHz Xtal Filter Baseband Demod 130-136MHz PLL1 PLL2 12.
LD2103 V2.8 Page 31 of 36 SRT Marine Instruction Manual SRT-MTB© Class B Marine AIS Block Schematics – Baseband Block Diagram To RF section JTAG 5 X 1 .1" DEBUG hdr UART 0 DAC CONTROL 12.288MHz 5502A 200MHz 1.26V core ADC DATA CODEC SET-UP CONTROLLER JTAG hdr LDSYNTH 2 LDSYNTH 1 RF SYSTEM CLK TXE 1 TXE 2 TXE 3 LNA ON SPI BUS SYNTH SPI Controller GPIO (with readback) Tx lockout timer and logic JTAG INTn Triple Rail Monitor 12V, 3.3V & 1.26V TPS3307-18 EMIF BUS 7 X 1 .
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LD2103 V2.8 Page 34 of 36 SRT Marine Instruction Manual SRT-MTB© Class B Marine AIS Appendix A Antennas and Antenna Mounting GPS Antenna The GPS antenna used must be of the active type (i.e. it should incorporate an LNA) and must be suitable for marine shipboard applications (index of protection, ruggedness, means of mounting, etc.).
LD2103 V2.8 Page 35 of 36 SRT Marine Instruction Manual SRT-MTB© Class B Marine AIS Warnings VHF Antenna Connection Connecting a badly mismatched VHF antenna, leaving the VHF antenna port disconnected, or shorting the VHF antenna port will activate the VSWR alarm, cause the unit to stop sending position reports or cause damage to the transponder.
LD2103 V2.8 Page 36 of 36 SRT Marine Instruction Manual SRT-MTB© Class B Marine AIS Software Radio Technology plc (SRT) is at the forefront of technology innovation and for this reason, reserves the right to alter, without notice, the specification, design or conditions of supply of any product of service. Information provided by SRT is believed to be accurate and reliable.
