User Manual

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IF Gain
The AGC can be turned off using the AGC Off button. The receiver gain
must then be adjusted manually. This is done using the IF Gain control.
Note that by setting an excessive gain, the receiver will overload and the
demodulated signal will be distorted. On the other hand, if the gain is too
low, it will make the receiver appear “deaf”.
Manual IF Gain setting is useful when hunting for very weak signals buried
in noise.
Manual IF Gain Control
The IF Gain control is only enabled when the AGC is switched off. The gain
“value” ranges from 0 to 100, where 100 corresponds to maximum gain. The
gain can be adjusted in three ways: by typing the value directly in the edit
box, or using the up and down arrow buttons, or by dragging up or down the
centre slider.
Audio AGC
The Audio AGC facility is available in the Demodulator panel, and provides a
supplementary function to the main AGC. (The main AGC employs a
hardware circuit, while the Audio AGC works in software.)
Audio AGC
Audio AGC is useful to compensate for audio volume changes when the
antenna signals are so weak that the main AGC is not yet activated, or when
the main AGC is disabled and the manual IF gain is used.