[time-nuts] Symmetricom Launches CSAC Product for Precise Timing and Sync...
J.D. Schoedel
jdschoedel at verizon.net
Tue Jan 18 23:05:49 UTC 2011
Quoting from a white paper on their site:
"it uses a tiny hollowed-out silicon cube filled with cesium gas."
On 01/18/11 20:17, paul swed wrote:
> Quick question is this a rb reference.
> Looked at the symetricom site they never actually say or I missed it.
>
> On Tue, Jan 18, 2011 at 2:37 PM,<SAIDJACK at aol.com> wrote:
>
>
>> Here is a link to the press release with more technical details and
>> pictures:
>>
>> _
>> http://www.eetimes.com/electronics-news/4212176/Chip-scale-atomic-clock-app
>> roaches-performance-of-modules-2_
>> (
>> http://www.eetimes.com/electronics-news/4212176/Chip-scale-atomic-clock-approaches-performance-of-modules-2
>> )
>>
>>
>> In a message dated 1/18/2011 11:32:33 Pacific Standard Time,
>> brooke at pacific.net writes:
>>
>> 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<time-nuts at studio442.com.au>
>>> To: Discussion of precise time and frequency
>>>
>> measurement<time-nuts at 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."
>>>
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