In our part of the world (NZ & Australia I think) there is a system using a
"zach (?) pager" that receives time signals on the paging network to
control clocks, sprinklers etc. You may be able to use this (they claim
accuracy is traceable to atomic standards).
I've been meaning to try & identify the signals & see if I can use it but
so far haven't had time.
The systems sends out two signals per hour - the first is a "time mark" and
the second contains the actual time that the "time mark" was actually sent.
This gets around the delay between sending a paging signal to the network &
its actual transmission.

May be of interest but I expect that GPS may be a better way to go

Richard P





Hi,

I really need to design a product that knows the official U.S. time, aside
from other features. Can someone tell me what is required for the hardware
and software to acquire the official time? And what kind of connections are
required?

Thanks a lot!

Tony

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