Dr Bruce Griffiths said the following on 10/22/2006 07:33 PM: > Didier > > If you are going to use a PPS divider to divide the oscillator frequency > down to 1Hz, you will need to measure the inherent jitter of the divider > to ensure that it doesn't degrade the measurement resolution. It may be > necessary to resynchronise the divided output using a fast D flipflop to > reduce the inherent divider jitter to less than the 20ps resolution of > the 5370.
The few experiments I've done indicate that there isn't that much sample-to-sample jitter in a divider built up out of a reasonable-length string of 74HC390 dividers, but the temperature stability is horrible. John _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
