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Re: [Discuss-gnuradio] Losing data during long collects
From: |
Eric Blossom |
Subject: |
Re: [Discuss-gnuradio] Losing data during long collects |
Date: |
Wed, 4 Jun 2008 21:52:51 -0700 |
User-agent: |
Mutt/1.5.17 (2007-11-01) |
On Wed, Jun 04, 2008 at 09:33:33PM -0700, Chris Stankevitz wrote:
>
> Thanks again. Is it ever possible for all of these things to happen:
>
> 1. write data to disk using cfile
> 2. hard drive cannot keep up for whatever reason (new sector, etc) and data
> is lost
> 3. A USRP "overrun" condition does not occur
>
> Thanks,
>
> Chris
I can't think of a case when this would happen.
What evidence do you have that data is being dropped?
Can you hook up a siggen and feed a single sinusoid to the USRP rx
daughterboard? Tune the USRP so that the sinusoid is not at DC in the
complex baseband, and log that data using your program and/or
usrp_rx_cfile. Then use octave or some other tool to look for
discontinuities in the received signal.
This would allow you to confirm or refute the existence of the
discontinuity using a much less complicated detector than your GPS
receiver.
Eric
- [Discuss-gnuradio] Losing data during long collects, Chris Stankevitz, 2008/06/03
- Re: [Discuss-gnuradio] Losing data during long collects, Eric Blossom, 2008/06/03
- Re: [Discuss-gnuradio] Losing data during long collects, Jeff Brower, 2008/06/03
- Re: [Discuss-gnuradio] Losing data during long collects, Chris Stankevitz, 2008/06/03
- Re: [Discuss-gnuradio] Losing data during long collects, Chris Stankevitz, 2008/06/03
- Re: [Discuss-gnuradio] Losing data during long collects, Jeff Brower, 2008/06/04
- Re: [Discuss-gnuradio] Losing data during long collects, Chris Stankevitz, 2008/06/05
- Re: [Discuss-gnuradio] Losing data during long collects, Jeff Brower, 2008/06/05
- Re: [Discuss-gnuradio] Losing data during long collects,
Eric Blossom <=
- Re: [Discuss-gnuradio] Losing data during long collects, Chris Stankevitz, 2008/06/05
- Re: [Discuss-gnuradio] Losing data during long collects, Robert Fitzsimons, 2008/06/05
- Re: [Discuss-gnuradio] Losing data during long collects, Chris Stankevitz, 2008/06/05
- Re: [Discuss-gnuradio] Losing data during long collects, Dan Halperin, 2008/06/05
- Re: [Discuss-gnuradio] Losing data during long collects, Chris Stankevitz, 2008/06/05
- Re: [Discuss-gnuradio] Losing data during long collects, Bob McGwier, 2008/06/06
- Re: [Discuss-gnuradio] Losing data during long collects, Chris Stankevitz, 2008/06/06
Re: [Discuss-gnuradio] Losing data during long collects, Juha Vierinen, 2008/06/04