Garmin VHF 720 Owner's Manual & Reference - Page 12
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Also for Garmin VHF 720: Specifications (2 pages)
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Keys &
Function
Displays
Squelch Key - This key breaks the squelch
(unmutes the audio) when pressed and held. It is
Squelch Key
also used to set the squelch threshold (the level
at which only strong signals can be received).
The squelch threshold is set by pressing and
holding the squelch key while using the UP/
DOWN keys to adjust the squelch level from 0
to 9. At level 0 (L0), all signals can be heard,
while at level 9 (L9), only the strongest signals
can be heard. Adjusting the squelch level
eliminates weak, unwanted signals, as explained
on page 17.
H/L (High/Low) Power Key - This key toggles
High
the transmitter power level from
(3 watts)
Low
to
(1 watt) when pressed and released. It
H/L Power Key
also locks the keypad when pressed and held for
PTT
more than one second.. The
key,
Power
key, backlighting key and the
key still
Squelch
function in the Lock mode. Locking the keypad
prevents inadvertent changing of channel
settings and feature modes.