[time-nuts] Frequency division by 81

[Gilles Clement]

Thanks for all your replies. 
Very interesting, A lot to digest.
Best, 
GIlles.



Envoyé de mon iPad

> Le 19 juin 2020 à 01:12, Richard (Rick) Karlquist <richard at karlquist.com> a écrit :
> 
> 
> 
>> On 6/18/2020 4:58 AM, Gilles Clement wrote:
>> Hi
>> I need to divide the output of an OCXO by a factor D=81 for testing purposes. So with minimum added phase noise.
> 
> If you are using any kind of digital divider, let me
> recommend that you first condition the signal to be
> divided by using an ADI LTC6957-1 to convert a sine
> wave into a high slew rate square wave without a lot
> of added noise.  If it is already a square wave, you
> still might want to pass it through a narrow bandpass
> filter to remove phase noise, and then turn it back
> into a square wave.  All of this is almost more
> important than what you use to actually do the
> division itself.
> 
> Rick N6RK