[time-nuts] How to measure Allan Deviation?

[Dr Bruce Griffiths]

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.

Bruce