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Furuno FM-4721 Manual

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2. OPERATION
2-8
2.9 Dual Watch (To CH16)
Dual watch scans two channels for communications. One channel is a normal VHF
channel and the other is CH16. When a signal is received on the normal channel, the
radio briefly switches between the normal channel and CH16 to look for a transmis-
sion. If the radio receives communications on CH16, the radio stops and listens to
CH16 until communication ends and then starts dual watch scan again.
1. Adjust the SQL knob until the background noise just disappears.
2. Select the channel you wish to dual watch with CH16.
3. Press the FUNC key followed by the 6/DW key.
The display alternately scans between CH16 and the channel that was selected
in step 2.
If a transmission is received on the channel selected in step 2, the FM-4721 starts
dual watch on CH16.
4. To stop dual watch, press the FUNC key followed by the 6/DW key.
Note: The priority channel may be changed from CH16 to another channel. Refer to
section 5.5 "Priority CH".
2.10 Scanning
Allows the user to select the scan type: Memory scan or Priority scan. [Memory Scan]
scans the channels that were programmed into memory. [Priority Scan] scans the
channels programmed in memory with the priority channel.
2.10.1 How to select the scan type
1. Press and hold down the CALL/MENU key until the
[Setup Menu] appears.
2. Rotate the CH knob to select [CH Function Setup] then
press the [SELECT] soft key.
3. Select [Scan Type] with the CH knob then press the
[SELECT] soft key.
4. Rotate the CH knob to select [Priority Scan] or [Mem-
ory Scan] then press the [ENT] soft key to store the se-
lected scan type.
5. Press the [QUIT] soft key several times to return to ra-
dio operation.
Daily Test
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