Thanks for the inspiring tips. I did not use the WX GUI scope for checking the phase offset. Instead, I log the baseband signal received by each RX antenna. Then, I plot the IQ constellation of the received baseband for checking their phase offset.
Can you be a bit more specific when you say the "multi_usrp object" and the "timed commands"? Are there tutorials that I can follow step by step for using the two functions you mentioned? Your comments are very helpful :) On Thu, Apr 23, 2015 at 6:18 PM, Marcus D. Leech <mle...@ripnet.com> wrote: > On 04/23/2015 06:06 PM, Pengyu Zhang wrote: > >> I followed the suggestions and plotted the received baseband signal in >> the IQ constellation. The phase offset of the baseband received by the two >> RX antennas are still not constant... Attached are the update flow graph >> and python program. Would be great if you can take a look again. Thanks. >> >> ALSO, the WX GUI scope sink doesn't maintain predictable phase-alignment > between multiple signal sources.... > > >
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