Hi What is their calibration interval and environment?
With GPS you will have the usual "when locked and stable" disclaimer. With some cost / effort you can get limited holdover at that level. For a true good for a year/running autonomously, type spec - you need a cesium standard. Getting one that will meet a rugged environment spec may be difficult. I'd bet the spec you are looking at has / should have a sub-spec that reads "when locked to an external reference". The implication being that the reference is exactly on frequency. Bob -----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of life speed Sent: Tuesday, April 20, 2010 1:27 PM To: time-nuts@febo.com Subject: [time-nuts] GPS 1 PPS accuracy limits Time Nuts; I have a customer request for a microwave frequency synthesizer with extreme accuracy requirements; 4 X 10^-11, or 0.04 PPB. Obviously this is way out of quartz oscillator territory. Is GPS 1 pulse-per-second useable, or do they need an atomic clock? Maybe they don't realize what they are spec'ing. _______________________________________________ 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.
