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in the S-Meter bar indicates the selected Auto-Mute threshold.
To disable the squelch and/or the Auto-Mute functions, right click the appropriate S-Meter zone.
The hysteresis of the squelch and Auto-Mute functions is approximately 6 dB.
The selected thresholds are peak values.
Squelch
8-11 AGC (automatic gain control)
The Automatic Gain Control keeps the audio output at a constant output level, disregarding the input
signal power. Three time decay constants can be selected with the buttons "Fast", "Med", and "Low" in
the AGC control bar.
The AGC can be excluded with the "Off" button. In this case the audio output level is controlled by the
VOLUME slider. When the AGC is off, large input signals can cause the saturation of the audio output.
8-12 AGC spike rejection
The Spike Rejection function emulates the behavior of the AGC of old analog receivers with a relatively
long attach time constant. When this function is selected the AGC circuit is much less sensitive to
impulse noise which can completely close the receiver gain and affect negatively the receiver
performance.
NOTE: The Spike Rejection function introduces a small amount of (soft) audio distortion which is tolerable in SSB/CW
communications and should not be activated for digital modes which may be far more sensitive than human hear to
nonlinear distortions. Use this function only when required.
Auto-mute
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