[time-nuts] CSAC vs NAC1

[Bob kb8tq]

Hi

If you set them both on the table, the CSAC’s I’ve seen are just slightly 
smaller than the NAC’s. It’s not by much. I never bothered to see if the 
mechanical specs on the parts reflected this or not. 

Bob

> On Apr 6, 2017, at 10:41 PM, jimlux <jimlux at earthlink.net> wrote:
> 
> On 4/6/17 5:11 PM, paul swed wrote:
>> Jim am I reading the casc power consumption correctly? .12 and .14 W.
>> Thats 10X lower.
> Yes..
>> Any idea on the $$
> 
> CSAC in the several kilobuck range, NAC in the 10-20k range, I think.
> 
> They're about the same size.. NAC is slightly smaller, I think.
> 
> 
>> Regards
>> Paul
>> WB8TSL
>> 
>> On Thu, Apr 6, 2017 at 6:11 PM, jimlux <jimlux at earthlink.net> wrote:
>> 
>>> Here's a quick summary of the datasheet performance between the
>>> Vectron/Accubeat NAC1 and the MicroSemi CSAC.  Bear in mind that Microsemi
>>> now has a wider temp range (i'm using the old rev J datasheet)
>>> 
>>> CSAC is 1/10th the power
>>> NAC1 has a better crystal, so the phase noise is better
>>> the "atomic" part is comparable in performane
>>> 
>>> 
>>> Parameter       NAC1            CSAC
>>> Aging           3E-10/mo        9E-10
>>>                1E-9/yr         10E-9
>>> 
>>> ADEV            2E-11 @ 100sec  2.5E-11
>>>                8E-11 @ 10      8E-11
>>>                2E-10 @ 1 sec   2.5E-10
>>> 
>>> phase noise
>>>                -86 @ 10        -70
>>>                -120 @ 100      -113
>>>                -138 @ 1000     -128
>>>                -143 @ 10k      -135
>>>                -148 @ 100k     -140
>>>                -150    floor
>>> 
>>> max chg         1E-9 (-20 to 65) 5E-10  (-10 to 35)
>>> 
>>> pwr             1.2W op         0.12
>>>                1.8W warm       0.14
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