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IQ correction

Posted: Sat Jan 04, 2025 10:46 am
by PA1EJO
SDR console is my favorite program for controlling SDRs, the latest addition is a ZynqSDR/LibreSDR which comes in a CNC housing. This SDR it is equivalent to the PlutoSDR, in fact the Pluto+ with 2TX and 2RX but it requires modified firmware. What SDR console could do better is recognize both RX and TX (currently it runs only at 960 kHz bandwidth), moreover SDR console only sees one RX (and TX) and the IQ correction could be improved. The latter is rather annoying, in the center of the waterfall there is always a intermitted signal, and it has everything to do with the LO frequency, once you zoom in and out the DC bias distorts the demodulator, you have to shift the waterfall after zooming. With airspy devices I never get this DC part, with this new SDR I do see it prominently (the HackRF does the same). Could the IQ correction please be fixed, I'm asking for a feature request. If there is no easy way out, then allow me to shift the LO frequency outside the baseband or somewhere to the side of the waterfall and not in the center of the waterfall.

73 PA1EJO Ernst