User Manual

WiNRADiO G3XX User’s Manual

In addition to the usual and self-explanatory AM, LSB, USB, CW and FM

modes, there is also AMS (synchronous AM), DSB (dual sideband,

suppressed carrier) and ISB (independent sideband).

For ISB, the audio output can be selected between the lower and upper side

bands using two selector USB and LSB buttons accessible under the Setup

button:

Note: Both channels of the ISB transmission can be recorded simultaneously

using the recording facility of the G3XX receiver. (In such case, the LSB and

USB signals are recorded as left and right channels of a stereo recording.)

Real-time Spectrum Scope

The real-time spectrum display shows the actual situation within the bandwidth

of the receiver. The actual filter bandwidth is 15 kHz, but the spectrum scope

shows a somewhat wider area of 20 kHz, hence the sloping edges. When you

press the mode buttons, you will note that the central highlighted region of the

spectrum changes its width. This corresponds to the IF (intermediate

frequency) filter bandwidth associated by default with the different modulation

modes. All these default values can be overridden and finely adjusted.

The Video filter is a low-pass filter used to smooth the displayed

spectrum.

When activated, the smoothness of the spectrum trace increases

when the cut-off frequency decreases. The frequency can be adjusted either

by direct typing in the edit box, or by clicking the up/down arrow keys, or, more

conveniently, by dragging the little slider between the up/down keys.