[time-nuts] New Subscriber, DIY GPSDO project (yes, another one)

[Poul-Henning Kamp]

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In message <7F4F318C-D220-41FF-A26F-282581DE3FE8 at n1k.org>, Bob kb8tq writes:

>This all comes back to *having* the ADEV / HDEV / Phase Noise data
>on your steered device and GPS to work from. In a lot of cases, people
>do not have that information ….. They are looking for a procedure to 
>truly do this “blind”. 

Right.

So you do not need to be very exact about where you think the
"allan-intercept" is for my method to work, within an order of
magnitude is generally OK, and if you wanted to, you could
add a third loop around the PI autotuning to try to optimize it
over a couple of years.

However, I am pretty certain that we can do better (and faster!)
than that, by tuning until we get the right PDF shape for the
zero-crossing intervals, if only we know what it should be.

My math skills have not been sufficient to derive that.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
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