Hello,

I have an X310 transmitting packets to an E310, the E310 can successfully
demodulate the packet and estimate the time of flight.  I'm sending one
packet per second for about half an hour and the ToF estimate is very
consistent, except for when I have an overflow on the E310.  I get an
overflow once every 15-20 minutes or so.

When I get an overflow my ToF estimate increases permanently by a small
amount, enough to affect my application.  For example, I might get 500
packets in a row with a ToF of 100 us each, then I get an overflow and all
my remaining packets have a ToF of 101.6 us.  All the USRPs are wired
together so my channel isn't changing.  I tried to figure out if I could
compensate for the difference but I couldn't figure it out.  I also tried
to reset the PPS on the E310, which didn't work.

I know it's on the receive side because I have multiple receivers and I can
match each overflow to each ToF change.  On the E310 I'm using UHD 3.9.2.
Can anyone help me figure this out?

Also, is there a newer image I should be using for the E310?  Or, a newer
UHD?  It doesn't look like the E310 is supported much anymore, or is there
something I'm not seeing?

Thanks,
Devin
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