Hi I would like to follow up this conversation. Is it possible to have a constant initial phase offset for every run when power is up? I knew the B210 can remains constant phase offset across two receivers during the operation. However, the challenge for me is that whenever power is up, the initial phase across devices is not constant. Namely, the first run v.s. the second run will have different phase offset across two receiver even though I feed into the same single frequency tone through the power-splitter. Is there anyway we can fix this thing?
Thanks! All Best, Jack On Fri, Jul 13, 2018 at 8:05 PM, Jack Yang <ccj...@uw.edu> wrote: > Hi I would like to follow up this conversation. Is it possible to have a > constant initial phase offset for every run when power is up? > I knew the B210 can remains constant phase offset across two receivers > during the operation. However, the challenge for me is that whenever power > is up, the initial phase across devices is not constant. Namely, the first > run v.s. the second run will have different phase offset across two > receiver even though I feed into the same single frequency tone through the > power-splitter. Is there anyway we can fix this thing? > > Thanks! > > All Best, > Jack > > > On Tue, Mar 24, 2015 at 2:38 PM, Ufuk Tamer via USRP-users < > usrp-users@lists.ettus.com> wrote: > >> I am using the block in default settings so time sync part is in default. >> >> On 24.3.2015 23:20, Marcus D. Leech wrote: >> >> On 03/24/2015 05:18 PM, Ufuk Tamer wrote: >> >> I am using the latest version. I have a simple GRC flow graph that takes >> two channel I&Q data and then processing this data in Octave. And every >> time I turn on the receiver (tx & rx locations are fixed), I get different >> phase offset between two rx channels. >> >> In order to apply direction of arrival (DOA) technique, I have to first >> use a reference signal to detect this random phase offset, remove it and >> then estimate the angle of transmitter. >> >> What are you using for time-synch in the UHD source block? >> >> >> On 24.3.2015 22:12, Marcus D. Leech via USRP-users wrote: >> >> On 03/24/2015 03:12 PM, Ufuk Tamer via USRP-users wrote: >> >> Dear all, >> >> I am testing the phase offset between two Rx channels of B210. For this >> case, I transmit a sine signal with another USRP device and receive it with >> two RX channels of B210. Then I calculate the phase offset between >> channels. The problem is the phase offset changes whenever I reset the >> receiver. So it gives a random phase offset on each device turn on. >> >> Is this normal? If yes, what is the reason for this random phase offset. >> Since both channels share the same LO, where this "random" phase offset >> come from? >> >> Thank you... >> >> ------------------------------ >> >> *Ufuk Tamer * >> >> What version of UHD are you using? >> >> How are you doing the two-channel receive? >> >> >> >> >> >> _______________________________________________ >> USRP-users mailing >> listUSRP-users@lists.ettus.comhttp://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >> >> >> ------------------------------ >> *Ufuk* >> >> >> >> ------------------------------ >> *Ufuk * >> >> _______________________________________________ >> USRP-users mailing list >> USRP-users@lists.ettus.com >> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >> >> >
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