Hi, Bjorn, it is good to know such splitter devices exist. This is really neat.
I'm using the built-in offset function of the M12+, and not an offset generator. I'm currently redoing the measurement to see if it has similar issues. And yes, I was also interested to see what would happen at other offsets. And, if all of them would do it. I'll post when I get the results. At the moment, I don't have something stable to serve as reference for the 53131As so I use the 10MHz output of the one as reference for the other. At least they are locked together. On 21 November 2013 14:34, Bob Camp <li...@rtty.us> wrote: > Hi > > The counter and offset generator both should be quite accurate at a 1 us > offset. That’s large enough that you are outside the range of most GPS > jumps. If you are going to move things around, you might as well move out > to that vicinity. > > Bob > > On Nov 21, 2013, at 6:20 AM, Tom Van Baak <t...@leapsecond.com> wrote: > > >> Below is a plot so you could see exactly what I measured. What is > peculiar > >> is that the time jumps by exactly 100ns to 200ns. Almost as if the GPS > >> receiver decides to offset the time by twice the amount I set it to. > Which > >> is why I initially thought it might be a firmware thing. I suppose > >> multipath is a good explanation, it is just odd that the time error is > >> exactly 100ns. > > > > Hi Stephan, > > > > A quick test you could perform is set the offset to 125 ns instead of > 100 ns and see if the jumps still occur, still occur at 100 ns, or now > occur at 125 ns. > > > > Since you have three M12's offset the third one by 150 ns and see if it > experiences jumps too. > > > > Question -- are you using the external 10 MHz reference input or output > for any of your 53131A counters? > > > > /tvb > > > > _______________________________________________ > > 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. > _______________________________________________ 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.
