Chapter 3: Service & maintenance
52
Troubleshooting guide
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 VHF 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 VHF for the first time after
leaving factory there is no MMSI number in the VHF
radio. For the DSC operation to function the MMSI
number must be entered in the VHF radio. For
further details see the installation manual.
Wrong MMSI
number
If a wrong number has been entered and stored, or
if there is a requirement to change it, contact your
authorized dealer.
Action
Symptom
Remedy
Summary of Contents for TT-6222A VHF DSC
Page 1: ...TT 6222A VHF DSC U s e r M a n u a l ...
Page 2: ......
Page 3: ...TT 6222A VHF DSC User manual Document number 98 131186 NEU D Release date December 5 2012 ...
Page 59: ...Chapter 2 Operation Setup 45 22222 Operation SETUP EXIT Top level standby ...
Page 62: ...Chapter 2 Operation 48 Setup ...
Page 72: ...Chapter 3 Service maintenance 58 Warranty and returning units for repair ...
Page 89: ......
Page 90: ...Thrane Thrane A S info thrane com thrane com U s e r M a n u a l ...