In the group of VFO Controls outlined in red below, those on the right (SPLIT to 0 Beat) are only visible
in Collapsed if they are selected in
the menu under Controls, or in Configure NaP3/Options/Show Collapsed.
The SUB button turns on the SDR SubRX, using the the VFOB frequency, simultaneously on the K3 and some
other rigs' SubRX. The KX3
is put into Dual Watch. A right click on the SUB button reveals a ThirdRX option, which allows the SDRSubRX to be tuned independently -
allowing SO3R operation!
The four other VFO controls work on both the SDR and the controlled rig, 0 Beat netting VFOA with a CW signal within the passband.
The next group of controls control how the display is shown:
The centre drop down sets the display mode, with Scope and Histogram showing the RX signal within
the passband.
The Scope display should not be taken literally in normal use - the maximum level is constrained by the
AGC. To get a truer indication of the
signal in the passband set the AGC to Fixd and adjust the AGC T: control to keep peaks within the display. In this setting, hours of
amusement can be had in SpanaScope watching an overdriven signal 'flat top' on the Scope while the resulting intermodulation spreads out to
the sides in the Spanadapter part of the display.
The Histogram display shows the power spectrum within the passband. More amusing fun to be had here watching
signals peaking at 20dB
higher below 200Hz than in the intelligence-carrying part of the voice spectrum. Keeps whales entertained.
Avg turns the signal averaging on and off. Hovering the mouse cursor over it will allow the mouse wheel
to move the Grid Max and Grid
Min levels up and down in unison. Using the mousewheel with the Ctrl key pressed changes the range between the values. These are all saved
per band.
Peak holds on the maximum signal level in the span. Hovering the mouse cursor over this allows the mouse
wheel to move the Waterfall
High and Waterfall Low levels. Using the mousewheel with the Ctrl key pressed also changes the range between these values. These are
also saved per band.
Hovering the cursor over Free allows the spectrum/waterfall proportions to be varied in SpanaFall view.