[time-nuts] Re: Repeatability of stability measurements

[hans-georg at lehnard.de]

First of all the resolution factor from my first post is a copy error
the correct value is 4.8828124999999998-11 (less decimal places). In the
attached diagrams the correct factor was used.  

I generated testfiles with 2046,2047,2048,2049,2050 intervals, loaded
into timelab and scaled them with 4.88281249999998-11. 

MDEV shows more noise as real measurements . Another testfile with 2000
intervals and scaled with 5e-11 shows similar results. 

In the Frequenc difference plot you can see the difference grows
stepwise with time. The zoom shows where the 2048 intervals are already
in the next time step and the 2000 intervals are not yet. By zooming in
you can also see this between the 2046 and 2050 intervals. 

Possibly an overflow or rounding error ? 

I think the overlap of this effect with the white noise of the real
measurements creates my measured jumps.  More noise attenuates this
step-like progression.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: testfileMDEV.PNG
Type: image/png
Size: 165160 bytes
Desc: not available
URL: <http://febo.com/pipermail/time-nuts_lists.febo.com/attachments/20220625/05f885e7/attachment.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Testfile2048_2000_FrequencyDiff.PNG
Type: image/png
Size: 68696 bytes
Desc: not available
URL: <http://febo.com/pipermail/time-nuts_lists.febo.com/attachments/20220625/05f885e7/attachment-0001.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Testfile2048_2000_FrequencyDiff_selection.PNG
Type: image/png
Size: 90364 bytes
Desc: not available
URL: <http://febo.com/pipermail/time-nuts_lists.febo.com/attachments/20220625/05f885e7/attachment-0002.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Testfile2046_2050_FrequencyDiff_selection.PNG
Type: image/png
Size: 95273 bytes
Desc: not available
URL: <http://febo.com/pipermail/time-nuts_lists.febo.com/attachments/20220625/05f885e7/attachment-0003.png>