Forget about SSB BPSK.
This event happens with simplest graph:
Result:
I’ve tried many sample rates ( 1M, 3.072M, 4M, 5M, 10M, 20M, 30.72M, 40M, 50M, 61.44M) with same results.
Ignore DC spike - it’s calibration problem, I think( TX DC calibration not working ).
With some gain tuning I’m able to lower some of spikes, but without success of cleaning up whole signal.