Hi If your goal is an ADEV measurement, you will need to tag the edges against a second “stable” PPS signal. A sequence of period measures can get you into issues related to round off problems.
Bob > On Feb 27, 2022, at 11:27 AM, Erik Kaashoek <e...@kaashoek.com> wrote: > > But why can't you measure the 1 s period of a PPS? > If the counter would be able to do gapless measurement and you set the gate > to 0.9s it should be able to measure the period of a PPS, at least my own > build counter behaves that way so I was surprised the U76200A could not do > that. > > On 27-2-2022 14:25, Azelio Boriani wrote: >> Without a reference? If the same PPS acts as start and as stop then >> one (I suppose) rising edge is start and the next rising edge is stop, >> so a measurement every second is not possible. Maybe a dedicated >> hardware with two channels where one edge is the start for a channel >> and stop for the other is necessary. >> >> On Sun, Feb 27, 2022 at 12:08 PM Erik Kaashoek <e...@kaashoek.com> wrote: >>> I'm trying to measure the phase of a 1 second PPS from a cheap GPS >>> module using a Picotest U6200A >>> Set up in time/period mode, input 1. Trigger level is set to 1V, DC >>> coupling, all seems to work well but there is only one measurement every >>> two seconds which either misses output the in between periods of >>> averages over two periods. >>> Does anyone know if it is possible with the U6200A to measure every >>> period of a PPS? >>> Erik. >>> _______________________________________________ >>> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send >>> an email to time-nuts-le...@lists.febo.com >>> To unsubscribe, go to and follow the instructions there. >> _______________________________________________ >> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an >> email to time-nuts-le...@lists.febo.com >> To unsubscribe, go to and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an > email to time-nuts-le...@lists.febo.com > To unsubscribe, go to and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.