I had a quick look at the datasheet, and it seems there is
no tuning register, only an aging register. That resister
you can use if you really want to recalibrate it, using the
DS3231 32Khz output and your 32Khz reference derived from a
caesium clock or something.
I wonder how Maxim calibrates these chips? A hidden register
perhaps, in hidden e2prom?
Cheers, Frank
-----Oorspronkelijk bericht-----
From: Cobra007
Sent: Thursday, February 23, 2012 10:14 PM
To: neonixie-l
Subject: [neonixie-l] Re: Dallas/Maxim TCXO question
So, what is the best way to calibrate these chips? How do you figure
out the values for tuning register and aging register? I normally set
the tuning register by comparison with a second time source over 1
week, usually that is good enough for about 10 seconds per year. But
how do you figure out the value of the aging register within 1 week
(or quicker)?
Michel
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