All, I am testing 2x USRP1 with RFX2400 daughter cards with benchmark_rx and benchmark_tx scripts and have questions. When I set the MCS to dbpsk, error rate I got was close to zero. When I set it to dqpsk, d8psk, error rate is 100%. When I set it to gmsk, certain daughter cards had close to 0 error rate, but certain swung from 0% to 100%.
I asked about it to Ettus research, they told me that it's likely to be due to frequency offset between the two boxes I have. If it is true, 1) how can I compensate the offset? 2) Has someone used dqpsk, d8psk in 2.4MHz ISM band before? If so, what extra step is necessary? Thanks, Thomas
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