[ntp:questions] Re: Allan variance plots

Piotr Trojanek ptrojane at mion.elka.pw.edu.pl
Thu Sep 18 14:01:41 UTC 2003

In article <3F69B162.2358F92 at udel.edu>, David L. Mills wrote:
>I don't know what your DATAPLOT reference is talking about. White phase
>noise has slope -1 on the log-log plot and random-walk frequency noise
>has slope +0.5. This is confirmed by many journal articles and by my own
>measurements. Forget about data plotting packages and go directly to the
>physics involved. Your quotes about slopes are plain wrong. Believe it
>really and truly.

Ok, I belive you. I had a problem with feeding analysis software
with wrong data. Now I know I have to feed it with frequency offsets
(in PPM) rather than phase offset data.

Now my plot is very similar to those in NTP papers, I like it:)

Piotr Trojanek

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