I'm seeing this on two E310s that are a few years old. I just swapped the sd card into a brand-new E310 and I am NOT seeing the frequency jumps. So, same exact software, but different aged E310s. Is there possibly a difference in hardware leading to this?
On Tue, Nov 24, 2020 at 1:04 PM Luke Whittlesey <luke.whittle...@gmail.com> wrote: > > I would say they are proportional to frequency. Attached is what it > looks like at 5GHz. There are jumps of 400Hz and 220Hz. > > On Tue, Nov 24, 2020 at 11:50 AM Marcus D Leech <patchvonbr...@gmail.com> > wrote: > > > > Try at lower and higher frequencies—are the jumps the same or proportional > > to frequency? > > > > Sent from my iPhone > > > > > On Nov 24, 2020, at 11:27 AM, Luke Whittlesey via USRP-users > > > <usrp-users@lists.ettus.com> wrote: > > > > > > On the E310 I'm seeing discrete jumps in the carrier. The carrier will > > > intermittently jump around in steps of about 50Hz. Sometimes it will > > > jump by about 200Hz. I've attached a waterfall display, but I don't > > > know if attachments will make it through. > > > > > > My setup is: > > > E310 SG3 > > > UHD3.11 using the C-api > > > Timing Reference is "internal" > > > Center Frequency 1GHz > > > I/Q signal is a stream of 1,0... for a CW at the carrier > > > > > > I can see the same thing when I set the timesource to "gpsdo", but I > > > wouldn't expect it when I set it to "internal". My gut says that this > > > is being caused by some timesource correction loop. If this is the > > > case is there a way to disable this? > > > > > > Thank you > > > <e310-lo-frequency-shifts2.png> > > > _______________________________________________ > > > USRP-users mailing list > > > USRP-users@lists.ettus.com > > > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com _______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
