Hello Jim,
You don't send the IQ data to RSPdx, but to some SDR software that's running on the PC (QMX is now acting like another RSPdx, so to speak). See
this discussion on how to proceed.
I've just checked on my QMX and the IQ seems to stay enabled. You may need to do a factory reset on yours and check again.
Regards,
YO3GFH
op. Adrian
