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Summary of Contents for Thrane&Thrane TT-3020B
- Page 1 TT-3020B Maritime Capsat Transceiver for the Inmarsat-C Network Technical Reference Manual Version 2.20 © Copyright Thrane & Thrane A/S June 1995 Tobaksvejen 23, DK-2860 Soeborg. Denmark...
- Page 2 Information in this document is subject to change without notice and does not represent a commitment on the part of Thrane & Thrane A/S. © 1995 Thrane & Thrane A/S. All right reserved. Printed in Denmark. Document Number TT-99-103373-220. Release Date: 19JUN95...
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Page 3: Table Of Contents
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual Table of Contents 1. Introduction 1 2. The Maritime facilities 2 2.1 Scanning and Login 2 2.2 Distress 2 2.3 Link Test 2 2.4 Message transmission 3 2.5 EGC message reception 3 3. - Page 4 Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 5.3 Status information 21 6. Using a Reader/Puncher in the Capsat system 22 6.1 Introduction 22 6.2 Connections and setup 22 6.3 TT-1610A High speed Reader/Puncher 22 6.4 Receiving and punching messages 24 6.4.1 Setup of reception 24...
- Page 5 Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 8.3 The TT-3020B status screen information 48 8.3.1 Hardware information 48 8.3.1.1 Synth's 49 8.3.1.2 LO 1/2 49 8.3.1.3 Corr.A/C/R 49 8.3.1.4 Dif/Temp 49 8.3.1.5 RX/TX/AGC/FIFO 50 8.3.1.6 R/C-B/B/S 50 8.3.2 Software information 51 8.3.2.1 Synchronisation 51...
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Page 7: Introduction
TT-3020B Capsat Transceiver Technical Reference Manual 1. Introduction This manual explains some of the details of a model TT-3020B Maritime Capsat Transceiver and provides instructions for using non-standard equipment together with the Transceiver and servicing and testing the Transceiver. Page 1... -
Page 8: The Maritime Facilities
When in the Maritime mode the user can send a distress alert to an LES by means of the Message Handling Program distress menu, by pressing the TT-3020B Set and Alarm front panel buttons or when using the TT-3042B Remote Alarm, by pressing the Alarm button here. -
Page 9: Message Transmission
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 2.4 Message transmission The Maritime Transceiver will allow you to send your text messages with distress priority in case of an emergency. Such messages will be routed to a default destination that is pre-programmed in the LES. This destination is normally the Search And Rescue (SAR) authority in the country where the LES is located. -
Page 10: System Generation
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 3. System Generation The procedure is as follows: 1. Turn on your Transceiver while you press the Set button. You must depress the button for at least 10 seconds or at least until you can hear the connected printer being initialised. -
Page 11: Entering Your Mobile Number
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 3.2 Entering your mobile number For ease of operation and general information when you operate your Capsat system, you should consider to enter the mobile number. Just type in the Inmarsat-C 9 digit number that you have received from your PTT authorities. -
Page 12: Write Protection
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual Name Contents Action E_next Preferred Ocean Set to None E_logout Time of last logout Erased E_login Time of last login Erased E_login_status Current transceiver login status Set to logged out E_lastlogin_status... - Page 13 Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual In the unlikely event that you need to manually change the contents of the EEPROM, then you need to remove the protection before remove the EEPROM from the Transceiver. Menu entry 7: Remove software write protection, makes this possible. The protection will be enabled automatically again when you turn on the Transceiver after re-installing the EEPROM.
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Page 14: Built-In Gps
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 4. Built-in GPS 4.1 Introduction to the GPS System The basic principles behind GPS are really quite simple - even though the system itself employs some of the most "high-tech" equipment ever developed. There are five important points: 1 Triangulation from the satellites is the basis of the system. - Page 15 Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual Figure 2: Possible positions shown as circle when two satellites are used. Then if we make a measurement from a third satellite we can really pinpoint ourselves. Because if we know that at the same time we're 13,000 miles from satellite C, there are only two points in space where that can be true.
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Page 16: The Gps Module
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 4.2 The GPS module The Capsat Transceiver uses a Rockwell NavCore V GPS Receiver module. The Rockwell GPS Module is a single-board, five-channel, parallel Global Positioning System (GPS) receiver suitable for integration. The GPS Module uses spread-spectrum receiver technology for reception of L1 GPS, 1575.42-MHz Standard Positioning Service (SPS) signals. - Page 17 Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual Rapid adaptation to obscuration via ephemeris collection for all visible satellites via a designated utility channel Maximum operational flexibility via user commands User selectable visible satellite mask angle. Page 11 19JUN95...
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Page 18: Satellite Navigation
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 4.3 Satellite Navigation The GPS Module provides four (3D) and three (2D) satellite navigation solutions. The Default Primary Navigation solution is 3D, Four Satellite Vehicle (SV) Navigation. Three Satellite Navigation is considered a secondary navigation solution, which requires a known user altitude. -
Page 19: Constant Altitude With Unknown Value
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 4.3.2.1 Constant Altitude with Unknown Value The application in this case might involve navigation across terrain that is flat, but of unknown altitude, or navigation on a lake of unknown altitude. -
Page 20: Amended Hold Mode
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual Note that both alternatives in criterion (3) essentially mean that there are not enough 'independent" measurements to continue to reliably calculate a solution. For example, using measurements from four satellites, two of which have nearly the same azimuth and elevation as seen from the antenna location, is worse than using measurements from three satellites. - Page 21 Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual Test Summary: OK 09 visible satellites SW Version 3.30 Navigation Mode: 1 FOM: UTC: Accept Altitude: 0 Hold: 1 VPerr: 3 m PDOP: HDOP: 01 HPerr: 4 m Elevation mask: HVerr: 564 cm/s...
- Page 22 Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 8: 1001-5000m 9: > 5000m Page 16 19JUN95...
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Page 23: Antenna Switch
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 5. Antenna switch 5.1 Introduction The Capsat Transceiver Software has now been enhanced with a possibility of directly controlling two antennas via a T-Bus device. The two antenna system has the property of being able to select one of two available antennas for use of Inmarsat-C (and GPS) signals. -
Page 24: Commands
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 5.2 Commands The Transceiver allows the use of environment variable, stored the non-volatile EEPROM, to control the switch parameters. The command to use is the set command with option -z . -
Page 25: Nominal Threshold
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 5.2.3 Nominal Threshold ASTHRNOM=<signal level> This parameter controls the signal threshold that will trigger the Transceiver to switch antennas and eventually reduce the threshold. The measured signal is averaged by the Transceiver over the Timer 1 period. The signal level value is then in the range from 0 to 50 where 50 is the best signal. -
Page 26: Fixed Antenna
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual Setting ASSCAN=PREF will let the Transceiver only scan the preferred ocean region (if any, otherwise all ocean regions will be scanned). Any other setting will cause the Transceiver to perform an all ocean scan. From then on all scan you may issue manually, will also be all-ocean scans. -
Page 27: Status Information
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 5.3 Status information If the Antenna Switch device is not present the Transceiver will respond with the INFO message: INFO 452: No Antenna Switch Device available You should then check the ru -l status and the cable and power to the device. You should also check that the T-Bus enable switch (number 1) inside the Transceiver is set to the ON position and that the T-Bus TX Jumper (number 1) has been inserted. -
Page 28: Using A Reader/Puncher In The Capsat System
It uses the TT-10202A/B PC Message Handling Software in a special 1200 baud version, with serial parameters 1200 baud, no parity, 8 databit, 1 stopbit, the TT-1610A reader/puncher, and the TT-3020B Capsat transceiver. The procedure described in this document, is intended for use until an automatic procedure will be available. - Page 29 Option - Configuration - Terminal You are now in direct contact with the TT-3020B transceiver. Try hitting the ENTER key a couple of times. If nothing happens, the communications parameters are incorrect, and you must follow the steps below. Otherwise you can skip to section 3.
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Page 30: Receiving And Punching Messages
TT-3020B Capsat Transceiver Technical Reference Manual The TT-3020B will confirm the command by asking you to push the Set button on the TT-3020B and hit the ENTER key at the appropriate prompts. All changed parameters will be stored in non-volatile memory when this button is pushed, including the baudrate and protocol settings detected upon entering the System Generation. -
Page 31: Punching Paper Tape Messages
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 6.4.2 Punching paper tape messages Find the name of the received message in the Receive log: Logs - Receive Log This could be a name like IN.089. Enter the terminal mode:... -
Page 32: Reading And Transmitting Messages
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual The ordinary typing facility adds an LF character to all CR characters and discards all LF characters read from the file. The binary typing facility does not process the characters in any way. -
Page 33: Reading Tapes In Binary Mode
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual Hit the key to get back to the main menu. 6.5.2 Reading tapes in binary mode In case you want to preserve the sequence of CR (carriage return) and LF (linefeed) characters from your tape, you must use the binary transfer facility. -
Page 34: Transceiver Software Details
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 7. Transceiver Software Details 7.1 EGC Message header format When an EGC messages is received by the Transceiver it puts a text header in front of the received message. The header format is: "<CR><LF>LES <number>... - Page 35 Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual The different service types have different addressing in the message. There are the following possibilities (see next page): Service Service name EGC Addressing Meaning Number General "ALL" All Tranceivers should receive this Inmarsat "ALL"...
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Page 36: Provider Name Mapping
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 7.2 Provider Name Mapping 7.2.1 Introduction To save space in the Capsat Transceiver EEPROM memory the 25 character provider name string that is downloaded via the NCS TDM channel, is not stored in it's full length in the Transceiver. - Page 37 Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual The figures The letters 5 bit value " & Uppercase letters in a received provider name are converted to lowercase. Characters not found in the table above will not be stored.
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Page 38: Baudot Characters
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 7.3 Baudot Characters The following table lists the Baudot (telex) alphabet characters that you can use when sending to a telex network destination. The table also lists the perforation pattern that corresponds to each letter on a paper tape. -
Page 39: Use Of The Transceiver Built-In Speaker
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 7.4 Use of the Transceiver built-in speaker The following table lists the way the software uses the built-in speaker in the Capsat Transceiver Transceiver function Mobile Type Information Type Description Beep... - Page 40 Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual Distress Alert Starting 1 normal Indicate that a distress has been started Distress Alert Receiving 1 normal After acknowledgement if not in silent mode Position Fix 2 fast When getting a position fix after power ON...
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Page 41: T-Bus Software Interface Description
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 7.5 T-Bus Software Interface Description This appendix describes the software packet interface that is used on the T-Bus (X5) connector of the Capsat Transceiver. For the hardware and timing requirements of the T-Bus see T-Bus Internal Time Division Command/Response Multiplex Data Bus Reference Manual. -
Page 42: Status Command
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual Capsat Transceiver T-Bus Transceiver TT-3042B TT-3042B TT-3042B Status Print Receive NMEA Printer Available and status Up to 15 ASCII characters NMEA 0183 data: Distress activation Position, Time, Altitude, GPS data NMEA transfer request... -
Page 43: Print Command
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual No input Switch 0 activated Switch 1 activated Both switches activated Remote Alarm accepts navigational data for NMEA output. In this byte is also contains the bit that indicates if the Remote Alarm will accept navigational data for NMEA 0183/RS-232 output. -
Page 44: Send_Nmea Command
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual When the ON bit is set the corresponding TT-3020A LED is lit, and when the BLINK set the TT-3020A LED is blinking. 7.5.1.5 Send_nmea command The Remote Alarm sends the following data to the TT-3020A: ----.----... -
Page 45: Time Command
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 7.5.1.7 Time command The Transceiver sends the following data to the RA every 3.2 seconds if a BGPS is available: ----.---- Info 0000 1000 Time marker (8) XXXX XXXX Course 0-360 in BCD, LSD... -
Page 46: Antenna Switch
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 7.5.2 Antenna Switch The Transceiver uses two T-Bus packets for communication with the T-Bus Antenna Switch device. 7.5.2.1 Introduction The following data is exchanged between the Capsat Transceiver and the Antenna Switch device using the T-Bus:... -
Page 47: Capsat Transceiver Service
The Central Processor Unit board is found in the bottom of the TT-3020B. The software for the Inmarsat-C protocols is found in socket U12. At power-on the CPU board will run through a self test procedure. The steps of the self test can be seen on the front panel LED's of the TT-3020B. - Page 48 Figure 6: TT-3020B DIP switch Settings with factory default settings All other switches must be set off to ensure proper operation. In addition you should not operate the TT-3020B Capsat Transceiver with switch 6 ON unless you are in the System Generation.
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Page 49: Power Supply: Tt 37-102120
TT-3020B Capsat Transceiver Technical Reference Manual 8.1.2 Power supply: TT 37-102120 The switch mode power supply is found at the underside of the TT-3020B. I n p u t C o n n e c t o r E 1 P o w e r S w i t c h... -
Page 50: Demodulator / Down Converter Board: Tt 37-102019
8.1.3 Demodulator / down converter board: TT 37-102019 The demodulator / down converter board is found at the upper side of the TT-3020B. I n d i c a t i n g d a t a c l o c k s i g n a l r e c e i v e d f r o m s a t e l l i t e . -
Page 51: Built-In Gps Module: Tt 88-300421
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 8.1.4 Built-in GPS Module: TT 88-300421 The built-in GPS module will always be self-tested at power-on. In case you suspect a malfunction in the module you should check the GPS status screen by selecting: OPTIONS - GPS STATUS Look at the first line at Test Summary and see the status information readout. -
Page 52: Replacements
8.2.1 How to replace a CPU board: TT 37-102819 The EEPROM found in socket U6 on this board, contains the identity of the TT-3020B Capsat Transceiver. If this board is to be replaced, the EEPROM must be moved to the new board if the Transceiver has to remain the same logical mobile unit in the Inmarsat-C System. -
Page 53: How To Replace A Power Supply: Tt 37-102120
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 8.2.4 How to replace a power supply: TT 37-102120 This unit can be changed with no further action. 8.2.5 How to replace an antenna unit: TT 69-102881 This unit can be changed with no further action. -
Page 54: The Tt-3020B Status Screen Information
This is done by means of the Status Screen. If your Transceiver is in terminal mode you can use the TT-3020B command st -w to display the status screen. If you use a Thrane & Thrane Message Handling Software you can display the same information by selecting the menu:... -
Page 55: Synth's
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 8.3.1.1 Synth's The synthesisers: The synthesiser part tells you if the frequency generating units are in lock, that is, if they operate correctly. These should all read "Yes". 8.3.1.2 LO 1/2 The local oscillators: The LO levels are the voltage levels that the Local Oscillators, the receiver detector circuits, outputs at the moment. -
Page 56: Rx/Tx/Agc/Fifo
This value will be around 3000mA. The resolution of the measurement is 500mA, so due to noise on the measurement it may vary from 2000 to 3000mA. If you have not used the TT-3020B for transmissions yet, the value will be 0mA. -
Page 57: Software Information
The headline gives you the version number of the TT-3020B software, and the corresponding release date, and the date and time of last service together with the initials of the service engineer. -
Page 58: Tdm Type
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 8.3.2.3 TDM type This tells you if the transceiver is currently tuned to an NCS or an LES channel, or in rare cases a stand-alone station. The possible readouts are: NCS, LES, Joint NCS or Standby NCS, 8.3.2.4 TDM channel number... -
Page 59: Tdm Origin
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 8.3.2.7 TDM origin This number is received in the frame-data from the current station. It will correspond to a station found either in the LES or the NCS table. 8.3.2.8 TDM frame number This is the number of the current received data-frame. -
Page 60: Printing The Information
Using the message terminal window program, this information can readily be printed out. Just select the following menus: OPTIONS - TRANSCEIVER STATUS - PRINT Using the TT-3020B interface this operation can be accomplished by giving the command: st -w p where the letter 'p' means "print". -
Page 61: Handling Of Communication-Error Situations
9.1 No synchronisation If you turn on your TT-3020B Capsat Transceiver and the LOGIN Indicator does not start to either flash or to light steady after 5 minutes, you should check the following: Do you have an antenna connected? Is the antenna cable properly fitted? Check the reading of the status screen's AGC level with the antenna connected and without the antenna connected. -
Page 62: Protocol Errors
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 9.2 Protocol errors Whenever a link error occurs the party originating the message is stated which means that you will see either Message from Transceiver: Message from Land Station: appear before the reason of the error. -
Page 63: List Of Link Error Messages
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual No party Network congestion Operator aborted Telex occupied Out of order Premature clearing Protocol failure Reverse charging acceptance not subscribed There was a failure in the remote equipment Ressource limit exceeded... -
Page 64: Les Messages In Case Of An Aborted Call
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 9.2.1.2 LES messages in case of an aborted call "Message from Land Station: Call aborted: " followed by: "Did not receive your message." "Transceiver did not follow call procedure." "Fatal Land Station error."... - Page 65 Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual "Your reception is OK, but vital information is not transmitted by Land Station." Either the signalling channel descriptor or the transmission burst was not received two times during reserved access transmission, or the signalling channel descriptor was not received 25 times in unreserved access.
- Page 66 Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual "Illegal service specified." The store-and-forward service type was not specified for the transmission. "Expected Land Station was not found" The Transceiver has checked the LES ID in your DNID table against the origin ID in the LES TDM and found that they were different.
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Page 67: Login Impossible
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 9.3 Login impossible If your Transceiver cannot login you should first of all contact your LES Operator to verify that the Transceiver is in fact present in the Inmarsat-C System database. -
Page 68: Tuning Fails
Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual 9.4 Tuning fails If your Transceiver looses synchronisation while in a protocol (e.g. message transmission), this may have been caused by incorrect channel information. If this happens the Transceiver will automatically check if the LES Network Table version number stored in memory is different from the version that the Inmarsat-C system currently uses. - Page 69 Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual —H— Index hardware information, 52 —I— Init system parameters, 5 Initializing system parameters, 6 —A— —L— aborted call, 63 activities in queue, 58 landmobile facilities, 2 AGC voltage, 54 local oscillators, 53...
- Page 70 Thrane & Thrane TT-3020B Capsat Transceiver Technical Reference Manual transmit power consumption, 54 tuning fails, 67 —U— uncommissioned, 2 —V— Viterbi decoder, 54 VXO, 53 Page 64 19JUN95...
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