On Tue, Mar 27, 2012 at 7:26 AM, Vincenzo Pellegrini <wwvi...@gmail.com>wrote:
> 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? > Use a 5-10dBm reference with no DC component. This corresponds to 1-2V p-p. --n > > 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 >
_______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
