[time-nuts] CSAC vs NAC1

Bob kb8tq kb8tq at n1k.org
Thu Apr 6 21:27:21 EDT 2017


Hi

Yes the numbers are correct, the NAC pulls roughly 10X the power of a CSAC.

Bob

> On Apr 6, 2017, at 8:11 PM, paul swed <paulswedb at gmail.com> wrote:
> 
> Jim am I reading the casc power consumption correctly? .12 and .14 W.
> Thats 10X lower.
> Any idea on the $$
> 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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