I get the impression that the current mode doesn't so much display the last read, but some sort of cascading historical view. For instance something that I know I changed the channel on still shows up in the spectral analysis 30, 60, etc. later.
If I can toggle show me the last scan and the last scan only, great.
I didn't think so much your idea, but that's a good idea.
Maybe a disruptive spectral analysis mode? Show me as much as you can, connection be damned.