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Re: [Discuss-gnuradio] atsc_cpll finally works

From: Eric Blossom
Subject: Re: [Discuss-gnuradio] atsc_cpll finally works
Date: Wed, 21 May 2008 10:02:54 -0700
User-agent: Mutt/1.5.17 (2007-11-01)

On Wed, May 21, 2008 at 07:12:39AM -0400, Charles Swiger wrote:
> Now my question: Is it possible to tune the usrp so the carrier is at
> +.31 Mhz ? (band center at 3, from -.2 to 6.2Mhz?)  Then we could run
> the cpll at 6.4 or 8Msps and get another big performance boost, maybe.
> Right now the pll at 19.2 Mhz (6.4 * 3) is an expensive part. 

No problem tuning the USRP where ever you want.  Between the VCO on
the d'board the DDC we've got 0.01Hz resolution.

> Eric, I guess the bit timing loop would work at 24Mhz (8 * 3).

I wouldn't expect that to be a problem.


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