[time-nuts] New Subscriber, DIY GPSDO project (yes, another one)

[jimlux]

On 3/8/20 8:53 AM, Poul-Henning Kamp wrote:
> --------
> In message <5f5e8822-006f-a059-51f8-d6a986300811 at earthlink.net>, jimlux writes:
> 
>> The conceptual idea being similar to setting a PLL Loop filter bandwidth
>> such that the reference noise (multiplied up) and the VCO noise are the
>> same at that point?
> 
> I tried that, and got absolutely no where, because the noise-spectra
> are not flat or even comparable.


That's exactly what I was thinking.. phase noise is straightforward. 
ADEV is not.

> 
> Instead started to look at the time distribution of the zero-crossings
> of the residual low-pass filtered phase error, and that has given me
> much better results all in all.
> 

interesting idea.