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Re: [Discuss-gnuradio] USRP1 starts passing garbage data
From: |
Marcus D. Leech |
Subject: |
Re: [Discuss-gnuradio] USRP1 starts passing garbage data |
Date: |
Tue, 29 Nov 2011 20:34:38 -0500 |
User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.24) Gecko/20111108 Fedora/3.1.16-1.fc14 Thunderbird/3.1.16 |
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