Users Manual

Spectrum UL / DL selection
When start and stop frequencies are set equal, then zero-span mode is activated to
show evolution of signals with time, which may be of special interest with pulsed
signals. The same thing can be achieved by setting the zero-span checkbox, with the
convenience that start frequency change would also change stop frequency
accordingly.
Spectrum zero-span mode
Resolution bandwidth becomes enabled in zero-span mode and sweep time is
automatically set according to its setting, which is user selectable between
25.000Hz, 12.500Hz, 6.250Hz and 3.125Hz. Average setting will also impact sweep
time in a similar way.