Hi Marcus, I constantly observed the DC offset and harmonic peaks yesterday. But they simply disappeared today. I am pretty sure I did not make any changes on hardware or software. One possibility is that they were caused by a long time use or the temperature change (room temperature < 25C).
I will report here if I can reproduce the problem. Thanks anyway! Huacheng On Sun, Dec 12, 2021 at 2:24 PM Marcus D. Leech <[email protected]> wrote: > On 2021-12-12 11:57, Zeng, Huacheng wrote: > > Hello, > > I am using N310 to observe its received signal in its four channels. I > observed some unexpected DC offset and harmonics as shown in the attached > figure. It happened only at channels RF0 & RF2; the signal from channels > RF1 & RF3 looks normal. I disconnected the antennas but the DC and > harmonics are still there. And they would not change if I change the center > frequency, sampling rate, or RF gain. > > The GNU RADIO and UHD versions are below: > [INFO] [UHD] linux; GNU C++ version 7.5.0; Boost_106501; > UHD_3.15.0.HEAD-0-gaea0e2de > > I also attached my python script code in case it would be useful for you > to identify the problem. > > Any suggestions? Thank you in advance! > > Hua > > _______________________________________________ > USRP-users mailing list -- [email protected] > To unsubscribe send an email to [email protected] > > Also, could you try explicitly specifying a subdev-spec of: > > "A:0 A:1 B:0 B:1" > > > _______________________________________________ > USRP-users mailing list -- [email protected] > To unsubscribe send an email to [email protected] >
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