Re: [Discuss-gnuradio] USRP1 reclocking

[Josh Blum]

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