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

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
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