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

Thrane & Thrane
TT-3020B
Capsat Transceiver
Installation Manual
2.5.5 Jumper configurations
Much of the flexibility of your TT-3020B Capsat Transceiver is due to the extensive use
of operator programmable configuration parameters, enabling the user to adjust the
TT-3020B to his specific application needs.
Most of the configuration parameters are contained in a single integrated circuit, a nonvolatile
EEPROM.
However, some parameters must be programmed by means of hardware jumpers or
straps on the main CPU board.
These jumper settings may easily be altered from their factory configuration to match
your particular application.
2.5.5.1 Default configuration
The figure below summarize the jumper configurations and their use.
Jumper Default Function
W3
Enable 12V or 5V supply to external GPS antenna.
Pos 1-2
12V
Pos 2-3
5V
Table 9: List of jumpers. You must not insert a jumper in any of the listed positions if you
use an built-in GPS (option 005)..
Warning:
Do not attempt to change jumper settings unless you have thorough
understanding of their meaning.
2.5.6 Clock battery back-up
The clock in the transceiver is permanently backed-up by an internal non-chargeable 3
Volt lithium battery. The service life of this battery exceeds 5 years.
If you turn off the TT-3020B Capsat Transceiver for a prolonged period this could drain
your battery. If your status screen indicates "Error in CMOS clock" in the first line, you
may need to change the battery.
If the battery wears out it must be replaced by qualified service personnel.
Please remember to logout of the Inmarsat-C system if you turn off the TT-3020B Capsat
Transceiver for a prolonged period.
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