Current-generation CSACs work like rubidium standards, and perform similarly. The optical excitation comes from a laser diode rather than a conventional Rb vapor lamp. They can't be considered primary standards.
Compare the ADEV graphs of some of the 'classical' Cs standards with what you can see in the Symmetricom CSAC literature, and you'll see that they are really very different beasts. -- john, KE5FX > -----Original Message----- > From: [email protected] [mailto:time-nuts- > [email protected]] On Behalf Of Perry Sandeen > Sent: Thursday, June 23, 2011 10:40 PM > To: [email protected] > Subject: [time-nuts] Symmetricon CS question > > > List, > > I’m still confused about the new Symmetricon CS unit. Is it truly a cesium > primary standard or is it a secondary standard that happens to use cesium? > > IF it is truly a primary standard, is saving up the $1500 for one a better > deal > IN THE LONG RUN than getting a used HP or other brand C.S. unit? I’d want > to use it and not have to fiddle with it to keep it running. > > Again, opinions welcomed > > Regards, > > Perrier > > > _______________________________________________ > 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. _______________________________________________ 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.
