On 06/07/2018 12:53 PM, Kenneth Collier via USRP-users wrote:
I've attached a diagram of my setup. I have not been able to measure
the power output of my signal. I'm using the tx waveform example
included with UHD with a gain of 20dB and a waveform amplitude of 0.3.
I'm not sure what the Rx gain of the receive channels was in the first
delta phase vs time plot I provided. It was less than 23 dB. I have
now set the Rx gain to 23 dB on both channels and have updated the
plot. Results appear similar. The magnitude of the signed 16-bit I/Q
received samples is around 7250 for one channel and 6160 for the other.
Ken
I would expect there to be a few degrees of instantaneous phase-noise
between RX branches, but the universe is never noise-free.
If you average these over a few dozen samples, it'll probably be zero
(or approach some limit that represents the residual phase *OFFSET*).
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