User Manual

Chapter 3: Service & maintenance
Troubleshooting guide 49
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Service & maintenance
DSC routine
testing
Check the DSC function regularly. Verify the
complete DSC installation, with antennas, by
transmitting a Safety Test call to another
station (coast or ship). The test call is
generated using the DSC call flow via menu
CALL.
The call should normally be replied by the
receiving station without questioning. The
default configuration of a DSC MF/HF radio is
auto-acknowledgement of any received Safety
test call requests. If a ship is equipped with
multiple radios a second radio can be the
station to check up against. The transmitting
radio will not receive its own transmitted calls.
If there is only a single radio on a vessel, a
facility is built into the unit where the DSC
engine can be verified using a test call that is
internally looped without activating the radio
transmitter PA. The test is executed via menu
SETUP, DSC SETUP. The call sequence that is
verified, is an Individual Safety Test Call
directed to own MMSI. The test status is read
in the display.
Missing
MMSI
DSC
operation is
not working
When powering up the MF/HF radio for the
first time after leaving factory there is no MMSI
number in the radio. For the DSC operation to
function the MMSI number must be entered in
the radio. For further details see the
installation manual.
Action Symptom Remedy