Actually I don't have a good reference (Z3815A): I'm still preparing my first disciplined Rb and have 2 Fluke PM6681s. I'm waiting for my SR620, it should be on its way to Italy right now. I have 2 TBolts but not yet turned on. What kind of reference have you used?
On Fri, Mar 30, 2012 at 8:10 PM, <saidj...@aol.com> wrote: > Hi Ed, > > no problem. It's an issue when some companies claim 2ns, when it's really > 5ns. Or show phase noise plots that seem to be measurements of just the > oscillator removed from the board and measured in a clean-room > environment, > not measurements of the module with all the digital control noise and > spurs > etc added.. > > bye, > Said > > > In a message dated 3/30/2012 10:29:32 Pacific Daylight Time, > ed_pal...@sasktel.net writes: > > Hi Said, > > On 3/30/2012 10:53 AM, Said Jackson wrote: > > Hello Ed, Azelio, > > > > We should also compare the same parameters. Sawtooth error of the m12+ > of +/-25ns is not its standard deviation, it's max/min. Compare that > number > to your 30ns max/min measurement on the 5372a. > > Yes, you're right. Thanks for the clarification. > > > Standard deviation of the m12+ is around 2ns with correction. That needs > to be compared to the 5ns you measure on the 5372a as that is the best > performance you will get from the CW12. Yes the uncorrected 1pps of the > m12 is > worse, but it is designed to be used with correction. So in the end the > m12m still performs better than the CW12. > > That's why I suggested to the OP that if the Commsync II uses sawtooth > correction the CW12 might not improve his performance. The limited > command set you mentioned in your other message is another potential > problem. > > Ed > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.