OK!
After fiddling around with HDSDR with SA44B and comparing it with the Elecraft KX3/PX3 and SDR-IQ I made the following general observations:
1) The KX3 and SDR-IQ are both much more sensitive for Low level RF signals. Tested mostly on the ham bands where weak signals can be found. Also doing quick A-B comparisons via an antenna switch.
2) With the SA44B I can’t get a 0 on the HDSDR S meter, there is a constant reading around 3-4 S units with the antenna disconnected. I suspect the IF gain may be a bit hot on the SA44. Of course, S9=50uV is adjustable.
3) The SA44/HDSDR spectrum graph is far superior to either the SDR-IQ/Spectraview or KX3/PX3 combo. Having adjustable RBW really helps pick out individual tones and audio components when analyzing RF and audio signals.
4) Woe is me!!!! With LO<=>TUNE (both the same numeric value and locked to each other) the SA44 is 4.26 HZ high at 10MHZ (WWV). I think I can live with that. 😉
All in all, being capable of decoding audio and seeing the spectrum at the same time is a very welcome addition to the SA44B software for those occasions when that is needed.
THANKS again.
John
