WiNRADiO G33DDC HF Receiver
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the DDC spectrum is currently being recorded or if one or more of the
receivers is locked or recording audio. In such case the lock or recording
indicators will flash to report this condition.
In both the DDC and demodulator spectrum scopes, the highlighted areas
represent the demodulator filter bandwidth:
For narrow DDC bandwidths, the grey area will appear similar in width for both
spectrum scopes, but with larger DDC bandwidths it will become much
narrower in the DDC spectrum (such as shown in the picture above).
Except for LSB and USB modes, dragging either one of the edges of the
greyed-out area inside the demodulator spectrum will result in continuously
changing the filter bandwidth. (This function is not available in the DDC
spectrum so as to prevent unwanted dragging of the entire passband when the
shaded area becomes too narrow with larger DDC bandwidths.)
For LSB mode, dragging the right-hand edge of the greyed-out filter passband
results in tuning, dragging the left-hand edge results in adjusting the filter
bandwidth. For USB mode, the opposite applies. The edge that is used for
tuning is highlighted for operator convenience.
IF Shift and Passband Tuning
Dragging the greyed-out demodulator filter passband in the DDC or
demodulator spectrum will result in tuning the receiver in a manner somewhat
similar to the
IF Shift
function in conventional receivers. The passband will
move inside the displayed spectrum and the tuned frequency will change
accordingly.
