Drag right mouse to shift spectrum, tune will move to center of spectrum.
Use mouse wheel to increment/decrement frequency by Step amount.
Enter frequency in kHz and hit Return or press Set Frequency (kHz).
Tick the 'Activate cursor' box to enable cursor: use wheel or click to select cursor location.
Click on the 'Autoscale' button to set amplitude range to fit current spectrum
The 'Max hold decay' setting adjusts how slowly the max hold trace decays
If the spectrum display/waterfall is focused, keyboard shortcuts are active:
Press space to toggle pause/run mode
'f' to toggle fullscreen mode
'c' to step through the colormap options
up/down arrow shifts the spectrum trace up/down
left/right arrow increases/decreases amplitude range
's'/'w' to increase/decrease size of spectrum display
'+'/'-' to increase/decrease FFT averaging
'm' to toggle max hold mode
'z' to center spectrum
'i' to zoom in spectrum
'o' to zoom out spectrum
Current:
v2.71: Added analog S Meter, band change to same band resets frequency on firefox, SNR shows negative values, SNR meter is red if SNR is < 0, right click and drag shifts spectrum
v2.70: Improved autoscale, added option to slow the waterfall, added tighter zoom levels