WiNRADiO G305 VHF/UHF Receiver
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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,
by using the up and down arrow buttons, or by dragging up or down the center
slider.
Software AGC
The
Software 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
Software AGC
relies entirely on software.)
Software AGC
Software AGC
is useful for compensating audio volume changes when the
antenna signals are so weak that the main (hardware) AGC is not yet
activated, or when the main AGC is disabled and the manual IF gain is used.
