Maybe it needs more pulse width at low freq? D. On 16 Feb 2014 20:15, "Jimmy Burrell" <[email protected]> wrote:
> I've recently purchased an HP 5335A and for the most part, we're getting > along famously. Then I tried to measure my GPS' 1 PPS pulse. I'm not seeing > anything Iike what I'd expect to see, e.g. 0.000001. Doesn't matter what > type of measurement I select (freq, period) the measurements are nowhere > near "1". In fact they are all over the place and changing a lot faster > than once per second. > > My first thought was "not enough signal" present at the input of the > counter causing a low SNR. But my scope says it's better than 2v on p-p. > According to the HP5335A manual, that should make the counter happy. > > I've never tried measuring any freq. this slow so I'm out of my element. > Probably missing something obvious. > > Any of this ringing a bell with anyone? Any clues or suggestions? > > Many thanks, > > Jimmy... > N5SSPE > _______________________________________________ > 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.
