Hello Andrew,
It is not really strong enough to do the FM method.
I have thought of a crude way to do it I think.
use the single ‘step’ in zero span mode and count how many
steps it takes to cover a given frequency range. I assume it steps by the amount of samples in the playback box? Also what sample rate do the recording happen at 27 MS/s ?
I look forward to the waterfall feature !
– Charles