Hi Antonio, in my opinion the Rb in the chain gives you two distinct advantages (and a lot of drawbacks): 1) Warmup time. Rb's can warm up very quickly, much quicker than the Crystal itself even under GPS discipline. This is especially so with new Crystals, or long power-off times, or when the crystal experienced lot's of mechanical stress/temperature changes etc. 2) Holdover capability during GPS outage. Every crystal will wander. Rb will do so much less. And maybe (in case of cheap oscillators) increasing the stability of the crystal oscillator for average times of say 20s to a couple of thousand seconds. bye, Said In a message dated 4/23/2008 15:11:56 Pacific Daylight Time, [EMAIL PROTECTED] writes:
Does it make any sense "GPS disciplining" a rubidium oscillator? In such a case we have a chain made of GPS - Rubidium - XTAL as opposed to the simpler case of GPS - XTAL (assume that XTALs are of the same quality, and so the control loops). Does the addition of Rb in the middle of the chain add any real advantages? Antonio I8IOV _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. **************Need a new ride? Check out the largest site for U.S. used car listings at AOL Autos. (http://autos.aol.com/used?NCID=aolcmp00300000002851) _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
