USRP1 starts passing garbage data

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?

On 11/29/2011 08:20 PM, Ryan P. wrote:

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 L.
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org

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