Garmin VHF 720 Owner's Manual & Reference - Page 23
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Also for Garmin VHF 720: Specifications (2 pages)
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Setting the Squelch Threshold
Setting the Squelch is important for reception
of signals you want to hear. There are ten
threshold levels, from 0, which allows all signals
to be received, to 9, which allows only the
strongest signal to be heard through the speaker.
The diagram in Figure 5 demonstrates how setting
the threshold level allows you to hear only the
signals you desire, while weaker, unintelligible
signals are not heard.
To set the Squelch threshold:
Setting the
Squelch
Threshold
Signal At Level 5
Only Signals
Stronger Than
Level 5
Will Be Heard
EXAMPLE of THRESHOLD
SET AT LEVEL 5
Selected Squelch Level
Up/Down Keys
Squelch (SQ) Key