This is a follow up to a previous post. I am having issues implementing a working (in all s/w) qpsk modulation scheme with the SDR devices. When running these two GRC flows (rx and tx) there are no errors received (sampling/attenuation). When viewing the scope output on the RX end arbitrary bit values are being read. This must be a tuning issue because there doesn't seem to be a difference viewed regardless if the transmitter is on or off.
I have successfully transmitted using an FM modulation scheme at the same carrier frequency.
It is expected to view both channels (I/Q) alternating between 1 and 0. Please see the attached diagrams and iio_info outputs. I'm really not sure what's going wrong here.
Any ideas as to why this is not working in hardware?