WiNRADiO G65DDC User’s Guide
27
of the currently recorded DDC1 spectrum. Any such attempt will be ignored
and the recording button above the DDC spectrum will flash to indicate the
reason why this operation failed. You would need to stop the recording first.
If tuning to a new frequency causes a receiver to be disabled, this disabled
receiver’s audio will be muted, and the tuned frequency shown in the
corresponding receiver tab will turn 'red' to indicate that this receiver is
currently non-active. Clicking on a disabled receiver’s tab will re-activate the
receiver, which may in turn disable a previously active receiver.
By clicking on the receiver tabs, you can quickly alternate between receivers in
a similar way in which you would use the
VCO
function in a conventional
receiver. There is the additional benefit of being able to change complete
receiver settings including demodulation mode, bandwidth, notch filter, audio
filter, etc. without the need to keep reprogramming when switching receivers.
Point-and-Click Tuning
Pointing and clicking anywhere inside the three spectrum scopes will tune the
currently selected receiver to the corresponding frequency. Also when clicking
on the spectrum, the
Shift
or
Ctrl
keys can be held down, which will round the
tuned frequency to the nearest kHz or 100 Hz, respectively. However, there
are some ramifications depending on which one of the three spectrum scopes
you click:
Clicking inside the
Wideband Spectrum Scope
at the bottom of the
application window (when the
Spectrum
button is engaged) will center the
DDC1 passband of the selected receiver to the new frequency. In turn, clicking
on the
DDC1 passband may center the demodulator (DDC2) passband to the
new frequency.
Dragging the Passband
The dark blue rectangular area inside the wideband spectrum scope
represents the DDC1 passband; the gray area inside both the DDC1 and
demodulator (DDC2) spectrum represents the demodulator filter passband.
You can drag all these areas and this will result in a corresponding change of
the tuned frequency. As with point-and-click tuning, there are again some
differences in behavior depending on which particular spectrum window the
highlighted passband is being dragged in.
