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Re: [Discuss-gnuradio] USRP1 reclocking
From: |
Josh Blum |
Subject: |
Re: [Discuss-gnuradio] USRP1 reclocking |
Date: |
Sun, 15 Apr 2012 09:03:45 -0700 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:11.0) Gecko/20120310 Thunderbird/11.0 |
On 04/15/2012 07:21 AM, naruto canada wrote:
> hi
>
> I've found some OCXO clocks on ebay:
> http://www.ebay.com/itm/Pletronics-26MHz-OCXO-Miniature-Oscillator-NEW-/140398082881
> Maybe someone with enough knowledge can tell if this clock will work with
> USRP1?
> (I am researching on my own too)
>
> I've just bought the board fairly recent, so believe it is rev.4
> Does the information on this page still apply:
> http://gnuradio.org/redmine/projects/gnuradio/wiki/OpenBTSClockModifications
>
> One more question:
> If I replace the clock on USRP1, will all the software (or hardware)
> (or some combination) mistake frequencies? (or some parameter)
> How does the hardware know itself is powered by some frequency of
> clock and not another clock?
> Is there a central place to communicate this info to hardware and software?
>
If you are using UHD, these are the instructions to inform the software
of the new clock rate:
http://files.ettus.com/uhd_docs/manual/html/usrp1.html#external-clock-modification
-josh