Hi,
On 09/07/2015 02:23 AM, Tom Van Baak wrote:
Finally analyzing the data with Tom Van Baak's adev1 (
http://www.leapsecond.com/tools/adev1.htm)
[paul@localhost Documents] $ ./adev1 1 < ../datafile.txt
Hi Paul,
There's also the adev4 and adev5 tools too. But my main suggestion is to use
John's TimeLab instead of a command line tool. Go to
http://www.ke5fx.com/timelab/readme.htm to download.
It turns out your raw data is very corrupted. If you view the phase and
frequency data graphically it will be apparent. This is why a self-contained
graphical tool like TimeLab is ideal. Until you get a clean phase difference
series, the ADEV numbers produced by a command line tool (or any tool for that
matter) are sort of meaningless.
I've sent you a bunch of sample plots off-list.
Crash-and-burn a number of times with TimeLab is really a good way to
learn a number of things. Eventually you get a good clue already on the
ADEV and when you see the phase/freq plot you just go "ah, I knew it!".
Sometimes swapping between wrapped (w) and unwrapped (p) phase provides
a good clue, but once you unwrap your phase correctly, swapping between
phase (p) and frequency (f) views helps. Allan deviation (a) and time
deviation (t) should be useful. Sometimes a modified allan (m) or
Hadamard (h) deviation helps.
Experiment and measure!
Cheers,
Magnus
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
