R&D suggest updating to a UHD 3.15 environment first. Sent from my iPhone
> On Nov 24, 2020, at 1:54 PM, Luke Whittlesey <luke.whittle...@gmail.com> > wrote: > > 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
