User's Manual

26
System
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5.2.6 Missing MMSI
Symptom: DSC function is not working.
If you have powered your VHF for the first time it might not have the MMSI number pro-
grammed. You must program the MMSI number before the radio is operational for DSC.
Programming is done via menu item 4.5.1
5.2.7 Radio time
Symptom: DSC logs are sorted with a wrong time stamp, or radio time is not correct.
The problem with a wrong radio time should occur only if the GPS is not connected in the
system. A valid GPS time signal will update the UTC time that is used for time stamping logs
only.
If you have a system without GPS, where you manually update position and time, it is also
required that you enter the radio time - at least right after power-up, if you want to get correct
time stamps on DSC logs. The UTC time is also used as the suggested time each time you
are requested to enter position and time manually (every fourth hour).
5.2.8 Channel not free
5.2.8.1 DSC Channel not free
Symptom: DSC transmission is delayed
DSC calls that are not distress or urgency calls will not be sent if the VHF is in the middle of
decoding a DSC call. The transmission will be delayed until decoding has been finished.
5.2.8.2 Working channel not free
Symptom: No suggested working channel in station call.
In a DSC station call a working channel is suggested. If for some reason a working channel
is not found within 1 second, no channel is suggested. If you see this problem please check
the following:
• Adjust to a higher squelch setting. If the squelch is always open, no free working call
channels will be recognised as occupied.
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