[time-nuts] ADEV query Timelab and TICC
holrum at hotmail.com
Mon Mar 20 02:35:35 EDT 2017
Yes, programs like Timelab and Stable32 are definitely the way to go for post-processing and analyzing your data in depth. Lady Heather is more of a real-time monitoring and data acquisition program.
The sensitivity of ADEV to data hiccups can be a good thing. If your ADEV data goes to crap you know you have a problem and need to examine the data in more depth to find out why. You can go in and remove / fixup the outliers to get a better understanding of the typical device performance but leaving in the "zingers" tells you what the device is truly doing.
> And without preaching too much, this is why I recommend no one does statistical work (e.g., ADEV) without first looking at the raw phase and frequency data. A doubting Thomas attitude and the human eye are valuable tools in science. Both Stable32 and TimeLab make it easy to display phase and frequency, not just ADEV. This is not by accident.
Maybe we have hyped ADEV too much on this list. This rant is especially addressed at several LH and NTP authors who think analyzing clock data and making ADEV plots is just something you blindly code or script or automate, as if working with clock measurement data was as pure as mathematics.
More information about the time-nuts