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 <time-n...@studio442.com.au> To: Discussion of precise time and frequency measurement <time-nuts@febo.com> 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 -- 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.