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Re: [Discuss-gnuradio] Possible residual carrier not reported correctly


From: Eric Blossom
Subject: Re: [Discuss-gnuradio] Possible residual carrier not reported correctly
Date: Mon, 28 Jul 2008 13:12:11 -0700
User-agent: Mutt/1.5.17 (2007-11-01)

On Mon, Jul 28, 2008 at 12:27:22PM -0700, isaacgerg wrote:
> 
> Eric,
>   I pulled GNU Radio from the SVN repository no more than 3 months ago. 
> What do you mean the FPGA had a flipping problem? Wouldnt this affect my
> USRP hardware or does the GNU Radio code correct for it?
> 
> Isaac

I was thinking of ticket:179 
http://gnuradio.org/trac/ticket/179
It was fixed in r6764 on the trunk on 10/31/2007.

> Eric Blossom wrote:
> > 
> > On Mon, Jul 28, 2008 at 11:34:01AM -0700, isaacgerg wrote:
> >> 
> >> Eric,
> >>   I have answered you questions inline:
> >> 
> >> >>Are you seeing any over or underruns ("uOuO" or "uUuU") on the console?
> >>   Occasionally, I see "u0" on the rx. But, even if i post process data
> >> offline, i still get the "flip"

If you're getting "uO" your machine is not keeping up.  This would
cause a discontinuity in the received data, post-processed or not.

Eric




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