User's Manual Part 1

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Signal Strength Mute Level
This section selects the level at which the Signal Strength Level (SSL) mute
(squelch) opens. Levels available are low, medium and high. When set to low the
mute will open on a relatively low level of received signal, when set to high the mute
will open on a relatively high level of received signal.
Use the Scroll keys to select the setting required (example
High):-
When the setting required is selected press the key