WiNRADiO G315 VHF/UHF Receiver
30
The higher the
AGC reference level
, the louder the maximum audio volume
(which can be then reduced by the volume control). However, with a high level
and strong signal levels there will be a distortion. Decreasing the AGC
reference level will result in lower audio levels.
The
Audio gain
setting is applicable only when SAGC is turned off, making it
possible to set a fixed gain level (i.e. the maximum volume) for each
demodulation mode separately.
Note:
1. SAGC is available only in AM, CW and SSB modes. (The FM demodulator
audio output is not dependent on the input signal level.)
2. If the receiver volume appears too low (and yet the volume control is all the
way up), make sure that SAGC is enabled.
3. If the sound is distorted despite the volume being turned down, make sure
that SAGC reference level is not set too high.
4. If the sound is too weak when SAGC is disabled (and yet the volume control
is all the way up), use the Audio gain setting to increase the level.
Notch Filter
The notch filter is a band-stop filter which can be used to minimize the effects
of interference falling inside or near a received station’s spectrum. The filter is
activated by pressing the Notch Filter button. The centre frequency and the
bandwidth can be adjusted using the correspondingly named controls:
For both controls, the same usage rules apply as with the IF
bandwidth setting, i.e. the values can be changed by direct
manual entry, or finely adjusted by using the up/down cursor
keys, or by dragging the slider between them.
Another way of changing the Notch Filter parameters is by
dragging the stopband of the filter (a blue shaded area) with the
mouse.
The stopband width can be adjusted by dragging the edges, while the centre
frequency can be changed by dragging the centre line, which makes it
possible to conveniently position the filter stopband over the interfering signal.
