WiNRADiO G35DDC HF Receiver
42
Passband tuning makes it possible to finely adjust the demodulator filter
position in the AMS, LSB, USB and CW modes without a whistle effect due to
a misaligned BFO, making it possible to avoid interference and finely tune the
receiver for optimum reception.
Pressing the
Reset
button sets the passband tuning offset to zero.
Demodulator Bandwidth Presets
The
Demodulator filter bandwidth
(which represents the overall selectivity of
the receiver) can be set in two ways: The quickest way is to use the
BW
presets
represented by the row of 15 buttons at the bottom of the Tuning tab:
The numbers on the buttons represent the bandwidth in kHz. These preset
bandwidths change depending on the selected mode, offering an optimum
choice of typical values applicable to that mode.
To change the demodulator bandwidth continuously, you can use the
DEM BW
control located above the demodulator spectrum scope:
There are two ways you can use this control: Either click on the box and
highlight all digits, then type the bandwidth directly into the edit box (you can
terminate the entry with
h
for Hz or
k
for kHz, or select the required bandwidth
value using the drop-down list.
Another very convenient method of adjusting the demodulator filter bandwidth
is a graphical one, by dragging the edges of the shaded area representing the
filter passband in the demodulator spectrum:
Did you know?
Amateur radio operators are credited with the discovery of long-distance
communication on the shortwave bands. The first transatlantic transmissions took place
in December 1921.
Summary of Contents for WR-G35DDC EXCALIBUR ULTRA
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