[time-nuts] Re: Practical relation between Phase Noise and ADEV

[Azelio Boriani]

The companion paper of the Enrico's chart is here:
<https://arxiv.org/pdf/2201.07109.pdf>

On Sun, Jul 24, 2022 at 1:38 AM Richard (Rick) Karlquist via time-nuts
<time-nuts at lists.febo.com> wrote:
>
> I would say that Magnus's explanation is the best one
> I have ever read.  And he did it without writing any
> equations!  Yet another great time-nuts posting.
>
> Rick N6RK
>
> On 7/22/2022 3:26 PM, Magnus Danielson via time-nuts wrote:
>
>
> > It is key to understand that ADEV does not determine phase-noise slopes.
> >
> > Yes, there is a relationship, but the troublesome issue is that ADEV in
> > practice is unable to make white phase modulation and flicker phase
> > modulation phase noise slopes into different slopes in ADEV, they both
> > show up as 1/tau slopes despite having different phase-noise slopes.
> > This means that you with the ADEV slopes does not know if the 1/tau
> > slope is white or flicker phase modulation. This annoyed David Allan and
> > his colleagues and it took another 15 years to resolve it and that was
> > only achieved with the introduction of MDEV.
> >
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