[time-nuts] Short term 10MHz source

[Hal Murray]

tvb at LeapSecond.com said:
> Here's what's happening. Unlike the counters mentioned above there is no
> fixed cycle or fraction in the TICC. The ring counter is free-running and its
> rate can vary from unit to unit, from temperature to temperature, from
> reading to reading. That's why the all-important post-calibration step is
> performed for every reading. This results in readings that are not fixed
> fractions of 1 ns or 20 ps or 64 ps or 62.5 ps or any other deterministic
> value. So each vertical "line" of the histogram is no longer a thin line, it
> is spread out quite a lot.

How much does the post-calibration vary if temperature and line voltage are 
stable?


jra at febo.com said:
> And just a note to those interested -- I'm targeting a modest update to  the
> firmware in the next month or so.  There are a couple of bug fixes,  and one
> new feature contributed by a 3rd party to improve functioning  with TimeLab. 

If you are working on the firmware, consider adding a time-nuts mode that also 
includes the post-calibration data.


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