TT-3020B Installation Manual - Polaris-as.dk

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Thrane & Thrane TT-3020B Capsat Transceiver Installation Manual 4.2 The first login (commissioning) The first login attempt from the unit (which is automatically performed by the Transceiver) will be recognized by the Network Coordinating Station (NCS) and served normally, (downloading a Land Earth Station (LES) network table into the Transceiver) and inform the Network Database the new unit is present and being commissioned. After the NCS has logged the unit into the Inmarsat-C Network, it instructs an predefined LES to start a Link Test with the unit. The LES ID is stored in Inmarsat's database of mobile units. When the Link Test is done, the TT-3020B Capsat Transceiver is logged in and commissioned. 4.3 Overview of a Link Test The Link Test consist of three parts: � Message Reception Test � Message Transmission Test and � Distress Test. The TT-3020B will ask you to perform a manual Distress Test but if you ignore the request the Transceiver will automatically send the Distress Test after 2 minutes. In the end of the test the Transceiver will receive the link test results. Page 42 30MAY95
4.4 Details of a Link Test Thrane & Thrane TT-3020B Capsat Transceiver Installation Manual As the first login performed by the Transceiver will cause the Commissioning (Link Test) to take place. You should not try to start the link test yourself or try to send any messages. If you do so, the NCS may find that your Transceiver does not respond to the commissioning announcement, and will consequently change the status of your unit to Barred, and you will no longer be permitted to use the system. After a while you will see a message on your screen and on your printer saying: Link Test started and when the MAIL indicator on the TT-3020B frontpanel starts flashing, the receive test has commenced. A test message is then received from the LES by the Transceiver. After the MAIL indicator has turned OFF, the transmission test begins. The SEND indicator starts flashing and after a while it will light continuously (the data is being transmitted) and then starts flashing again. The SEND indicator will turn OFF when the protocol has finished. The Transceiver will request you to perform a distress test. If you ignore this request the Transceiver will automatically send the Distress Test for you after 2 minutes, and the ALARM indicator on the frontpanel will start blinking. When the distress has been acknowledged by the LES the indicator will be on permanently. If your Transceiver has been configured as Maritime, you will be prompted to send a distress and you must do so before the message disappears from the screen of the Message Handling Program (if you do not use a Thrane & Thrane Message Handling Program, you must send the distress alert within 2 minutes after you receive the prompt). If you send a Distress yourself you will see the message "Distress issued and put in queue". You can ignore this. The printer will give an acknowledgement that the distress has been sent. After a successful distress transmission the printer will report this The Transceiver now will wait for the test results to arrive from the LES, and acknowledge the reception of these by a short transmission (burst). When receiving the results the screen will display: - Link Test finished and the results will be printed out. The results of the test can also be viewed with: - OPTION - LINK TEST 30MAY95 Page 43
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TT-3020B Installation Manual - Polaris-as.dk

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