Strangely, the article from the original email in this thread http://www.insidegnss.com/node/2446#Baseband_Technologies_Inc_
mentions the useage of cesium atoms in a resonance cell. The data sheet does not mention cesium (at least from what I can see.) ----- Original Message ---- From: Brooke Clarke <[email protected]> To: Discussion of precise time and frequency measurement <[email protected]> Sent: Tue, January 18, 2011 11:32:21 AM Subject: Re: [time-nuts] Symmetricom Launches CSAC Product for Precise Timing and Synchronization Hi Mark: I got the idea that it's a Rubidium clock. Have Fun, Brooke Clarke http://www.PRC68.com Mark Spencer wrote: > The long term aging spec is interesting to me, as a cesium physics package is a > primary standard wouldn't there be an ultimate limit to the total long term > aging ? (I took a quick glance at the full data sheet and didn't see any > reference to this.) > > > ----- Original Message ---- > From: Julien Goodwin<[email protected]> > To: Discussion of precise time and frequency measurement<[email protected]> > Sent: Tue, January 18, 2011 8:04:20 AM > Subject: Re: [time-nuts] Symmetricom Launches CSAC Product for Precise Timing > and Synchronization > > On 19/01/11 02:35, Pierpaolo Bernardi wrote: > >> Though this could be of interest... >> >> http://www.insidegnss.com/node/2446 >> > "The SA.45s reportedly provides ... short-term stability (Allan > Deviation) of 2E-10 @ 1 sec, long-term aging of 3E-10/month" > > > From the data sheet of the bigger Rubidium micro-clocks: > > SA.33/35m: > 1 Sec stability-<3E-11 > 1 month aging - +/1 1E-10 > > Neat, but only really of benefit to *really* space/weight/power critical > devices. > > "The cesium atoms are “excited,” or heated to a vapor state by a beam > generated from a vertical-cavity surface emitting laser (VCSEL) that > passes between upper and lower polymide heater/suspension strips. The > VCSEL was designed by Sandia Labs, one of Symmetricom’s partners on the > CSAC team." > > _______________________________________________ > 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. > > > > _______________________________________________ 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.
