Furuno FM-8800D Service Manual page 16

DSC Test by only one FM-8800S/D
Note: When RT ANT is used together with CH70 WR ANT, TX radio wave is transmitted to
RX Circuit of CH70 WR. So, function test for DSC and CH70 WR can be carried out.
Procedure:
1) Select [SHIFT] -> [5: ACK] and set to "MANUAL ACK".
2) If possible, select [MENU] -> ERASE LOG and delete a LOG of "RCVED
ORDINARY".
3) Select [MENU] -> [0: HI/LO] and set a power to "LOW".
Check LOG
1) Press [CALL] key to create DSC message.
- CALL TYPE : Test
- SHIP ID : MMSI of No. 2 VHF Own ship
2) Press and hold down [CALL] key more than 3 seconds to transmit DSC message.
"Call in progress on CH70" message appears and immediately "Test request call
received" message appears. And then alarm is released. Press [CANCEL] key and
stop the alarm.
Dotted line shows DSC TEST
CALL is received by CH70 WR.
Fig. 2 Communication Test by only one VHF
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