I'm in the process, but it's a lengthy process. There is something
messed up with the C API in 3.15, so it doesn't work for me as a
simple drop in replacement. Would it be wise to try to jump straight
to 4.0?

On Tue, Nov 24, 2020 at 2:40 PM Marcus D Leech <patchvonbr...@gmail.com> wrote:
>
> 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

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