[time-nuts] Possible replacement for FE5680A

[Azelio Boriani]

This is very interesting: I think you have a precision local clock source
to accept a slowly varying input frequency and "clean" it for the
transmission so that it is the clock source that ultimately dominates the
output stability.

On Mon, Mar 12, 2012 at 2:24 PM, Jim Lux <jimlux at earthlink.net> wrote:

> On 3/12/12 2:20 AM, Azelio Boriani wrote:
>
>> Yes, build three and compare them but your comparator has to have a very
>> low noise floor. I think that in addition to building new higher precision
>> clocks you need to build new lower noise TI counters.
>>
>>
> This is part of the thrill (or frustration) of working at the state of the
> art limit.
>
> At work we build state of the art deep space transponders with very low
> added Allan deviation (4E-16 at 1000 sec).  Figuring out a way to prove
> that they work is often harder than designing and building the actual
> article under test, particularly when you want to demonstrate that it will
> do it with a slowly varying input frequency.
>
>
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