Turn down the RF gain a bit as well as the baseband amplitude. Does this make any difference?
Sent from my iPhone > On Apr 10, 2023, at 9:41 AM, Shenk, Trey E via USRP-users > <usrp-users@lists.ettus.com> wrote: > > > I'm using a B205mini to transmit signals. When transmitting, I can see copies > of the SOI at harmonics of the center frequency. I ran some measurements of > total harmonic distortion, and found it to range from 39% with a 100MHz to > 23% with a 1GHz carrier. The second harmonic is <-50dBc, but the third > harmonic is usually around -10dBc. > > My main concern is for the lower frequency carriers, like 100MHz, because > multiple harmonics will show up on a spectrum analyzer set to a wideband. > I've looked at putting an RF filter at the output, but I need the system to > be able to switch transmit center frequencies in a range from 100MHz to 5GHz. > > Is it possible to reduce the harmonics by some hardware setting (driving with > gnruadio)? > > Thanks, > Trey > > > <carrier_freqsweep_fc0200M_gain55.png> > _______________________________________________ > USRP-users mailing list -- usrp-users@lists.ettus.com > To unsubscribe send an email to usrp-users-le...@lists.ettus.com
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