Maybe the 10MHz and the PPS are not exactly aligned but you can see that the "persistance" of the 10MHzB (blue trace) is exactly the same of the PPS B (red trace), so they are absolutely consistent and perfectly "linked" together.
On Thu, May 3, 2012 at 12:42 AM, <[email protected]> wrote: > > Yes, all made clear. > > Trigger on Ch.4, I see. You have written "green: 10MHz PRS10B" but it > must > > be A, otherwise it seems that the PPS and the 10MHz of the PRS10 are not > > phase aligned. Moreover, the PRS10B seems to track the PRS10A with "some > > delay" as the 10MHz from A spreads on more than 5nS (useful, the infinite > > persistence, isn't it? I use it a lot) > > > > > > I had > > locked Tbolt 1PPS going into PPS_IN of PRS10A > PPS Out of PRS10A going into PPS_IN of PRS10B. > > I watched/measured > 1) PPS out from Tbolt on ch 1 (yellow) > 2) 10MHz out from PRS10A on ch 2 (green) // Corrected > 3) 10MHz out from PRS10B on ch 3 (blue) // Corrected > 4) 1PPS out from PRS10 B on ch 4 (red) > > I should do some proper measurements with TIC, instead of just 'watching' > on the scope. Yes the 1pps and 10MHz is ofcause stable within the same > PRS10. But should not the 10MHz zero crossing be aligned with the 1PPS? > Cables were not perfectly matched, but should be within 2-3ns of each > other. > > Yes, persistance is very nice! > > -- > > Björn > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
