[time-nuts] Lady Heather's Tbolt oscillator auto-tune function
scott.j.stobbe at gmail.com
Tue Sep 13 22:52:41 EDT 2016
Pardon my lack of knowledge regarding Lady Heather, what is the x-axis
scale? I assumed the text line above the plot is the various y-axis scales.
This is good data. Thanks
On Tuesday, 13 September 2016, Mark Sims <holrum at hotmail.com
> Okee dokeee... here it is. Not much difference. The initial step is
> smaller, but it still spikes. After that things are pretty much the
> same. After it cool down, I'm doing another run with the initial voltage
> set to the peak of the spike.
> One slight difference was with the new initial voltage setting (closer to
> the current 10.00000000 MHz operating point), it appeared to acquire
> satellites a few seconds faster (but that could just be luck of the draw).
> Setting the initial voltage to something far off of optimum would be
> interesting... I seem to remember it taking several minutes to acquire.
> (Gratuitous astro feature plug... Lady Heather can show moon
> rise/transit/set/age times in addition to the sun times)
> > I would be very interested to see the result of another dead cold start
> of this same Tbolt, with INIT set to 0.518v. Of course, the time at
> which the second satellite is acquired (hence, the temperature of the
> crystal when discipline begins, and thus, the exact DAC voltage required
> for a stepless transition, will be a bit different from one start to the
> next, so it won't be perfect. But it will be a hell of a lot better
> than starting from 0.499v).
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