Hi There are several approaches to doing 1 pps readings - which one are you trying?
1) Feed in two 1 pps signals, have one start and the other stop the counter 2) Feed in a 10 MHz and a 1 pps signal have the 1 pps start and the 10 MHz stop the counter 3) Feed in an accurate 100 Hz and a 1 ps. Run the same as in 2. Each has their issues and problems. If you have a very accurate 1 pps, then 2 and 3 work pretty well. If the pps is all over the place then 1 is your only rational way to go. Bob On Aug 23, 2013, at 9:14 AM, James Robbins <[email protected]> wrote: > I am having some difficulty setting up my HP53132A to make 1 PPS Time > Interval readings. I am outputting them to TimeLab via the counter's > "talk-only" output. TimeLab reads the counter fine and I am able to make > plots of 10MHz frequency comparisons. But I need a little help in properly > setting up the counter for 1 PPS readings. > > > > If anyone is familiar with using this arrangement and would be willing > describe their setup and to exchange a few emails off line, I would much > appreciate it. I can be reached at jsrobbins.earthlink.net > > > > Jim Robbins > > N1JR > > > > PS: My reason for trying 1 PPS measurement is that while my 10 MHz > frequency ADEV ("a") readings in TimeLab when measuring one GPSDO vs another > GPSDO look very nice, the phase ("p") readings of those same runs show quite > a bit of drift (e.g. 1.5us/24 hours). > > _______________________________________________ > 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.
