Furuno MARINE VHF RADIOTELEPHONE FM-3000 - Manual (Page 48)

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7.Set Mode
7.2.5 DSC watch
DSC watch monitors Channel 70 while you are receiving an-
other channel. If a distress signal is received on Channel 70,
the transceiver monitors Channel 16 and 70 alternately until
the distress signal disappears. If a signal is received on an-
other channel, DSC watch pauses until the signal disappears.
Note: This function may not be available for some channel
groups depending on dealer setting.
7.2.6 Beep tone
You can select silent operation by turning beep tones OFF, or
you can have confirmation beeps sound at the push of a key
by turning beep tones ON.
Note: The optional FM-3010 has its own setting for the beep
tone.
7.2.7 Internal speaker
When an external speaker is connected and the transceiver’s
internal speaker is not required, the speaker on the trans-
ceiver and microphone can be deactivated.
“SP OFF” appears on the function display when the internal
speaker is turned OFF.
• The order of indication precedence is “SP OFF,” “LOCAL” and
“CALL.”
7.2.8 LCD contrast
This item adjusts the contrast of the LCD in 8 steps.
Note: The optional FM-3010 has its own setting for the LCD
contrast.
Set Mode
LCD
Contrast
LCD contrast 4 (default)
Set Mode
Internal
Speaker
Internal speaker ON (default) Internal speaker OFF
Set Mode
Beep
Beep tone ON (default) Beep tone OFF
Set Mode
DSC watch
DSC watch OFF (default) DSC watch ON