Uniden BC60XLT - Manual (Page 15)

How Squelch Works
Think of “SQUELCH” as a
gate.
If the gate is set too low
(SQUELCH too low),
everything (all noise as
well as signals) gets
through.
If the gate is set too high
(SQUELCH too high),
nothing gets through.
If the gate is set just right
(SQUELCH set properly),
just the desired signals
get through.
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