System - Furuno FS-1570 Service Manual

3.3 DSC SETUP

10. SYSTEM

To unlock the system menu, move the cursor over "PROTECTION ON" and then enter
the password ([x][x][x][x][x][x]).
The system menu contains the following items.
MMSI (FIXED)
The registered MMIS is displayed. See page 3-1 for how to register MMSI.
LINE OUT (+0 DB)
Adjusts the output level of the modem on DSC and NBDP DSP boards in 1.5 dB steps.
Leave the setting as default.
WATCH RCVR (MF/HF, MF)
The watch receiver is set to "MF/HF" for the ship navigating in sea areas A3/A4 or
"MF" for the ship navigating in sea area A2. When the receiver is set to MF/HF, up to 6
DSC watch keeping frequencies are programmed. When the MF is selected, the
frequency is solely 2187.5 kHz.
CH DET S LEVEL (OFF – 255)
Before transmitting Routine and Business messages, the system automatically monitors
the channel to ensure that it is free. If the signal level is stronger than CH DET S
LEVEL, CH BUSY appears at the lower left of the display, indicating that the channel
is in use.
The preset volume of 100 is the same level as S-meter reading of 4. The maximum
reading of the S-meter is equal to 255. To switch off the channel monitor function, set
CH DET S LEVEL to OFF. Forced transmission is made by using [CALL]. During
channel monitoring, AGC is set to FAST automatically.
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