Re: [time-nuts] GPSDO uncertainties

2018-10-08 Thread Bob kb8tq
Hi The question becomes very much, what confidence level are you after? Is 99% good enough? Are you after 99.%? Obviously the stability gets worse as you crank on more nines. Next layer to the onion is - how long have things been running and under what conditions are they running? A few

[time-nuts] GPSDO uncertainties

2018-10-07 Thread donald collie
I have a GPSDO which has a Trimble receiver, and Trimble OCXO inside.[I think it runs Lady Heather] What I would like to know is what uncertainty the 10MHz output will be with a 10 second count.This presumes that the GPSDO is receiving satellite signals, and the OCXO is being suitably diciplined.