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Re: [Discuss-gnuradio] phase coherence for N210 and SBX

From: Pengyu Zhang
Subject: Re: [Discuss-gnuradio] phase coherence for N210 and SBX
Date: Thu, 23 Apr 2015 18:23:44 -0400

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 <address@hidden> 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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