Hi Nick, thanks for the answer. Everything clear. Just a further question. Would a 0V-mean, 3.3V peak-to-peak sinusoid be correct as a reference signal for the B100?
regards vince Il giorno 23 marzo 2012 18:30, Nick Foster <n...@ettus.com> ha scritto: > On Fri, Mar 23, 2012 at 10:18 AM, Vincenzo Pellegrini > <wwvi...@gmail.com>wrote: > >> Hi Nick, >> I have noticed that "j101" onboard the B100 outputs a 64 MHz reference. >> >> Could it be possilble to feed that signal somehow into a second USRP B100 >> to be used as a reference? >> > > You would have to go through some gymnastics (read: soldering) to get that > reference into the second B100, and some code rework to recalculate clock > rates based on a 64MHz (or divisor of 64MHz) instead of 10MHz. > > >> >> Could it be possible as an alternative to lock two B100 to an external 10 >> MHz reference while still working at 8Msps sample rate ? >> > > Yes, this is what the ref in connectors are for. The external reference is > independent of the sample rate. The B100s will continue to operate > normally, except locked to each other. > > --n > > > >> >> my best regards >> >> vincenzo >> >> >> >> >> Il giorno 23 marzo 2012 16:54, Nick Foster <n...@ettus.com> ha scritto: >> >> On Fri, Mar 23, 2012 at 3:41 AM, Vincenzo Pellegrini >> <wwvi...@gmail.com>wrote: >>> >>>> Hi everybody, >>>> >>>> just a very quick question: >>>> >>>> is it possible to enslave the clock of a B100 to the clock of another >>>> B100 via the "REF IN" input or in some other way? >>>> More precisely, is there a way to extract the clock signal from a B100 >>>> and feed it into another B100 to enslave the latter to the former? >>>> >>>> It would be great to be able to keep them in frequency and phase synch >>>> that way. >>>> >>> >>> Vincenzo, >>> >>> The ref in input on B100 is intended to accept a 10MHz signal. Multiple >>> B100s can be synchronized by using a common reference, but there is no >>> facility to lock two B100s to each other without a common external >>> reference. >>> >>> --n >>> >>> >>>> >>>> thank you >>>> >>>> vince >>>> >>>> -- >>>> Vincenzo Pellegrini >>>> http://www.youtube.com/user/wwvince1 >>>> >>>> _______________________________________________ >>>> Discuss-gnuradio mailing list >>>> Discuss-gnuradio@gnu.org >>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>>> >>>> >>> >> >> >> -- >> Vincenzo Pellegrini >> http://www.youtube.com/user/wwvince1 >> > > -- Vincenzo Pellegrini http://www.youtube.com/user/wwvince1
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