Hi Andrew - That's certainly interesting! Have you tried a more recent version of UHD? 3.14.1.1 is the latest release, and it might contain fixes for the issue you're having. Worth a try IMHO. - MLD
On Mon, Oct 28, 2019 at 2:41 PM Boggio-Dandry, Andrew via USRP-users < usrp-users@lists.ettus.com> wrote: > Hello, > > > > We are having trouble with spikes in received signals. This happens with > both the X310 and B210. We have a stable setup using Ubuntu 17.10 and UHD > 3.10.3.0. There are no receive problems. On Ubuntu 18.04 and/or Ubuntu > 16.04, however, no matter the version of UHD these spikes appear. For > example, our Ubuntu 17.10 running UHD 3.10.3.0 with a B210 and Ubuntu 18.04 > running UHD 3.10.3.0 with a B210 were both set to receive and captured the > following *at the same time* using rx_samples_to_file --freq 2.484e9 > --rate 20e6 --gain 20 --args --wirefmt sc16 --file file_13.dat --duration 1. > We did not transmit anything, we just wanted to capture the noise. > > > > *Plotting real part of received noise from Ubuntu 17.10, UHD 3.10.3.0 > setup:* > > > > *Plotting real part of received noise from Ubuntu 18.04, UHD 3.10.3.0 > setup:* > > > > As you can see, the spikes appear on the B210 capture on the machine > running Ubuntu 18.04 with UHD 3.10.3.0. When you zoom in very close on the > spikes: > > > > > > Any idea why this may be happening? Any suggestions would be appreciated. > > > > > > [image: Logo] <http://www.albany.edu/> > > *Andrew Boggio-Dandry* *| Ph.D. Student* > > *Department of Electrical & Computer Engineering,* > > *University at Albany, State University of New York* > *e:* aboggio-dan...@albany.edu > > *w:* https://www.andrewboggio.com > *m:* 518-687-3102 > > [image: facebook icon] <https://www.facebook.com/andrew.boggiodandry> [image: > twitter icon] <https://twitter.com/AndrewDandry> [image: linkedin icon] > <https://www.linkedin.com/in/aboggiod/> [image: instagram icon] > <https://www.instagram.com/andrewboge/> > > > > > > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > -- Michael Dickens Ettus Research Technical Support Email: supp...@ettus.com Web: https://ettus.com/
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