Yeah, I see this too. I thought something didn’t look right - see my attached screenshot. I’m using UHD 3.7.1 and a B200. (I know the UHD version is old - it’s on a deployed system want to test UHD 3.9x for stability first). The screen cap is with a gain around 50 and 25MSPS on an unterminated TX/RX. Really should probably terminate it w/50 Ohms for this measurement. Looks like it’s about 30dB above the noise floor to me... > > From: Andy Walls <andy@silverblocksystems.net <mailto:andy@silverblocksystems.net>> > Subject: [USRP-users] B210 10 MHz GPSDO leakage into Rx > Date: September 12, 2015 at 8:48:04 AM EDT > To: usrp-users@lists.ettus.com <mailto:usrp-users@lists.ettus.com> > > > Hi, > > I have a USB3 B210 with the GPSDO installed. > > When I run uhd_fft using an VERT2450 on TX/RX port, with a high enough > sample rate, I see two well defined tones at +/-10 MHz from the center > frequency. When I touch the GPSDO can with my finger, the received > power from the tones goes up a few dB. > > I guess this proves that the GPSDO 10 MHz is being picked up by the B210 > RF frontend somehow (and that I'm an antenna). > > Aside from the obvious RF shielding, is there a way to mitigate some of > this leakage by configuring the B210 a certain way? > > Has anyone else noticed this? > > Does anyone know if the 10 MHz leaks out on transmit as well? > > I'm using UHD_003.008.004-0-g93011c14. > > Thanks. > > -Andy > > > > > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com <mailto:USRP-users@lists.ettus.com> > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com <http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com>