[time-nuts] Phase noise in stable 32

Anders Wallin anders.e.e.wallin at gmail.com
Thu Jan 25 11:57:55 EST 2018


For AllanTools and other testing I have tried the FFT plots in Stable32.
It seems to use a fairly simple FFT which has problems for divergent
noise-types. The Welch algorithm is better for these.
The x-axis should end at the Nyquist frequency, i.e. half of your data rate.
For meaningful phase-noise analysis you'd want phase observations at 100
kHz or more, e.g. from an SDR or similar.


On Thu, Jan 25, 2018 at 12:47 AM, slawek dabrowski <slawdabr at wp.pl> wrote:

> Hello to the group,
>
> Have you ever used frequency/phase data to estimate phase noise of your
> O's using Stable32? I probably do something wrong in conversions when using
> Power button because my plot starts on 10e-7 Hz and ends on 10e0 Hz
>
>
>
>
>
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