You have purchased a Perseus-Receiver, so you know about HFSpan.
Perseus Spectrum Analyzer
Wouldn't it be nice to have an additional Waterfall-Display?
Here it is. I spent some time in dealing with the SDRDK and here you
can see the result
Version 2.3 is out, updated for Perseus-Software V21i.
Fast scan: 1 to 100 frames/second (Timer driven, maximum depends on your
hardware (Processor, Graphic Card)).
Slow scan: Scaninterval from 1 to 60 seconds per line
Perseus sync: High speed scanning.
Recording and Playback of complete spectrum.
Copy Display to Clipboard
Timecontrol: bug fixed:
changing the scan mode is disabled while scan is active
New: Optional setting of frequency- and level-offset for converter operation, inverted/non inverted
For those who don't need offsets: Set the "Enabled"-entry in the ini file to zero
More details will be found in the "ReadMe" in the Zip-File.