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Re: [Discuss-gnuradio] help : how long usrp can run continously in norma

From: Kieran Brownlees
Subject: Re: [Discuss-gnuradio] help : how long usrp can run continously in normal environment.
Date: Fri, 10 Sep 2010 10:19:05 +1200

We have seen the same behaviour when trying to run overnight on the USRP1, the flowgraph was just doing FM mod (LFRX in LFTX out) and it had a graphical sink. Have the flowgraphs you used been made in GRC (ie could this be a wx issue?).


On Fri, Sep 10, 2010 at 5:32 AM, Marcus D. Leech <address@hidden> wrote:
On 09/09/2010 11:42 AM, Anil Sharma wrote:
Hi everyone,
   I want to test something with  usrp running continously under normal environment.
Can someone tell me the real data of how long usrp is capable of running continously.

_______________________________________________ D
Three years ago, I used to run my USRP1-based radio astronomy software for months at a time
  with no issue.

In the last year or so, I've been unable to maintain those kinds of uptimes with either USRP1 or
  USRP2, which I ascribe to fundamental changes in Gnu Radio, but I haven't been able to put
  my finger on exactly which flow-graphs will "wedge" after a few days, and which ones will
  keep going and going.  I have one flow-graph that uses the USRP2 at low bandwidths (400Ksps
  or so) that seems to be able to run forever.  Another, similar flowgraph, will tend to "wedge"
  after a few days.

I also have a flow-graph that uses an ALSA source and sink, and it can only run for a few
  days before "wedging".

I think the USRP *hardware and drivers* are perfectly capable of running forever, but the
  current Gnu Radio seems to have issues that I haven't been able to pin-point with long-running

Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium

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