On Wed, Feb 15, 2012 at 7:06 PM, rmsrms1987 <[email protected]> wrote:
> > Hello All, > > There was a previous project done in my research group where a external > device generates a 64 MHz clock to the USRP1 in addition to a PPS > signal. Currently I am making appropriate changes so a similar project > can be used for the USRP2/N210. I was wondering if the same 64MHz > external clock is connected to the USRP2, would this override the > default 100MHz master clock? I am still fairly new to the USRP, so this > could be a very trivial question. My understanding right now is that an > external reference clock has to be equal to an integer division of > 100MHz (i.e 100MHz/n), but this could be totally wrong. Any advice on > this issue would be greatly appreciated. > USRP2 and N210 were designed to take a 10MHz reference clock, the type commonly generated by reference oscillators and GPSDOs. It is possible to use a different frequency which is divisible into 100MHz, but you will have to modify uhd/host/lib/usrp/usrp2/clock_ctrl.cpp to cope with a different reference frequency. There is no easy path to getting a 64MHz external reference into the USRP2/N210. --n > > Thank you very much, > Rob > -- > View this message in context: > http://old.nabble.com/External-Clock-set-to-64MHz-on-USRP2-N210-tp33333495p33333495.html > Sent from the GnuRadio mailing list archive at Nabble.com. > > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >
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