Hi If you look at the scale on the EFC plot, it’s likely showing you a 1 LSB change on the dac….
Bob > On Mar 16, 2016, at 7:38 PM, Joseph Gray <jg...@zianet.com> wrote: > > As I mentioned a while back, my trusty Z3801A, which has worked well > for several years, went into holdover some time ago and stayed there. > Until recently, I haven't had time to look into this. About 20 days > ago, I did power cycle it to see if that made a difference. It did > not. > > In the middle of the night, last night (couldn't sleep), I decided to > see what initiating a new survey would do. Since the unit doesn't lock > to as many satellites as my Lucent with the newer Oncore, it took > quite a while for the survey to finish. > > I just got home from work and this is what I am seeing: > > https://dl.dropboxusercontent.com/u/19599147/Z3801A.png > > The good news is that the unit no longer telling me the PPS is > invalid. It looks like it will be another long while before it comes > out of Recovery (assuming the PPS stays locked). > > I'm not the best at interpreting these graphs. At this point, should I > be concerned abouth the spikey nature of the EFC graph, or will things > calm down eventually? I assume that the PPS graph won't show until > Recovery is done? > > If this unit loses PPS lock again, or otherwise acts up, then I would > assume it is a hardware problem, and I'll have to put it on the bench. > > Joe Gray > W5JG > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.