I just finished Reciever module with ProgRock kit as LO.
My intention now is to use it as SDR rx for IF output from my K3 and TS-850 and use with CW skimmer.
So I have LO on 8.195x4, rf input directly to T3 (w/o band-pass filter) and cennected I/F out from K3 - everything seems to be OK.
CW skimmer is decoding signals but there are some "ghosts" from opposite sideband. Need for I/Q balance adjustment.
I jump into I/Q balance window (as part of CWSkimmer application) and no data there :-( (there are empty graphs for phase/gain).
So I tried to connect PM-SDR unit (same levels, same input frq etc,, same cabling and sound card for I/Q,...) and I can see data plots in Phase/Gain graphs and calculated balance. And traces on CW skimmer are w/o ghosts and all is perfect.
So at summary - I am not able to perform automatic I/Q balance with my RX module and looking for any advices/experiences. I am quite sure I made T3 correctly with correct orientation and phasing (as unit seems to produce correct I/Q signals). I do not know if there can be some other source of so big phase/gain shift to be out of range of this automatic algorithm in CW skimmer or...?
Thanks for any advice...