> That won't work as one of the sources is the PPS output from an Oncore > GT which has a PPS error spec < 500ns with SA on. > Whilst it may be a little lower without SA, it may be still be somewhat > greater than 100ns. > > Dividing the 10MHz down to 1MHz or perhaps 100kHz would be better. > The 5370A timebase noise contribution to the measurement error will > still be insignificant. > > The plot doesnt appear too discordant with the Oncore GT spec.
Ah, interesting... I stand corrected, then. Not at all familiar with that particular piece of hardware. Looks like the jitter is more like 600 ns or so (6E-7 at t=1s), so the measurement is in the right ballpark after all. I hadn't tried TI in a 1-pps versus 1-pps measurement for some time, so I ran a measurement overnight. The graphs were fine but the frequency-count chart is buggy (to put it charitably)... -- john, KE5FX _______________________________________________ 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.
