On 12/31/2012 7:12 PM, David Duffy (AVD) wrote:
> Maybe using the GPS to correct an on-board RTC would be a better option?
>
> Some of the field units have GPRS  connectivity so I could maybe use
> NTP, but a single solution for all of them would be nice.
> David...
>
>

Have you looked at any of the high accuracy RTC chips ? Intersil makes=20
some that will auto calibrate based on the temperature and can run for=20
years without losing time.
http://www.intersil.com/en/products/timing-and-digital/rtcs/real-time-clock=
s/ISL12022M.html

Mark

--=20
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