[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."
>>>
>>> _______________________________________________
>>>   time-nuts mailing list -- time-nuts at 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 at 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 at 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 at 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 at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
>    






More information about the Time-nuts_lists.febo.com mailing list