Re: [Discuss-gnuradio] USRP1 starts passing garbage data

[Marcus D. Leech]

On 11/29/2011 08:20 PM, Ryan Pape wrote:
> I have an application that runs 24/7 with a USRP1.  I am having 
> occasional problems where it appears the USRP (using UHD) starts 
> returning garbage data after an apparently random period of time.  In 
> the most recent case, the app ran with no problem for approximately 36 
> hours, although previously we have run as long as 7 days without an 
> issue or restart (not all restarts are due to a problem).
>
> I don't believe I am running out of memory.  The flow graph appears to 
> continue to run, and I don't think the data is zeored out as I get 
> occasional partial frame syncs (random) during this time.
>
> Restarting the app is sufficient to fix the problem - I don't have to 
> recycle USRP or reseat USB.
>
> What would be the best place to look to determine the root cause?
Could you describe your set-up in more detail?

Do you get overruns before you start getting "garbage", and what is the 
character of your "garbage" is it samples full of noise, or zeros,
  or some other fixed value?

Do you have completely up-to-date UHD and Gnu Radio?  What type of host 
machine is it?  OS?


--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org