WiNRADiO G315 VHF/UHF Receiver
32
Audio Filter
The
Audio filter
makes it possible to apply filtering to the demodulated audio.
This is useful in particular for noisy signals, where intelligibility is improved by
emphasizing particular frequencies (usually speech frequencies 300-3000 Hz).
In the FM mode the audio filter is usually necessary to provide
de-emphasis
of high frequencies. It is also useful to remove low-frequency audible tones of
CTCSS squelch signalling.
The
Audio filter
is activated using a button at bottom right of the demodulator
panel:
There two types of filters: band-pass and low-pass, and their parameters can
be adjusted under the
Setup
button:
The
Audio filter settings
make it possible to adjust audio filtering parameters
separately for each demodulation mode. The
On
button either enables or
disables filtering, and is tied to the
Audio filter
button in the demodulator front
panel.
