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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