Dear Ian and All,
Although I tried what you have said, the phase is random and different every time I run the flow graph. I deeply suspect that synchronization is actually done on the boards. I use a GPS receiver for synchronization and yesterday I noticed that the shape of the PPS signal is as the one in the attached image. I am afraid that the ripple and the overshoot can imitate the behavior of the PPS in much smaller period than one sec. Do you believe so? Can I use a usual function generator for the PPS instead of the GPS receiver? In other words, should the ref/pps signal be sync? Best regards, Zo Subject: Re: [Discuss-gnuradio] Synchronizing 3 USRP-N200 From: i...@ionconcepts.com Date: Wed, 3 Apr 2013 11:59:20 -0700 CC: discuss-gnuradio@gnu.org To: xtmpcvs...@hotmail.com Zo,Have you tried swapping cables between USRP's? both REF/PPS and signal (one at a time) to see if the apparent phase differences follow particular cables/signal paths? On Apr 3, 2013, at 2:32 AM, Zooz Engineer <xtmpcvs...@hotmail.com> wrote:Hi Marcus, Thanks for replying. I did the following test after your comments: 1- to rule out the scope sink problem, I used a file sink and plotted the output using octave: Same results observed. 2- I took the outputs of the splitters to the oscilloscope and there are aligned. Are there other ways to test Ref/PPS other than the one I mentioned in my original mesage? Best/ Zo_______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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