Channel Watch; Dual Channel; Triple Channel - Furuno FM-4800 Operator's Manual

CHANNEL WATCH

5. CHANNEL WATCH

5.1 Dual Channel

Dual channel scans two channels for communications. One channel is a normal VHF
channel and the other is CH16. The following is how the DUAL CH feature works
when a signal is received on one of the channel:

If a signal is received on the normal channel, the radio quickly switches between
the normal channel and CH16 to look for a transmission.

If a signal is received on CH16, the radio stops and listens only to CH16 until
communication ends and then starts DUAL CH scan again.
Step 1 Press and rotate the Volume/Squelch control to adjust the squelch until
the background noise disappears.
On the home screen, rotate the Menu/DSC control to select a channel to
Step 2
DUAL CH with CH16.
Press the Menu/DSC control to enter the "MAIN MENU" page.
Step 3
Step 4 Select "CH WATCH".
Select "DUAL WATCH".
Step 5
The radio returns to the home screen. The display alternately scans
between CH16 and the channel that is selected in step 2.
To stop DUAL WATCH, press the Back key or the Menu/DSC control.
Step 6

5.2 Triple Channel

Triple channel scans three channels for communications: CH16, the second priority
channel, and a normal VHF channel. The following is how the TRIPLE CH feature
works:

If a signal is received on the normal channel, the radio quickly switches among
the normal channel, second priority channel, and CH16 to look for a
transmission.
FM-4800 Operator's Manual
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