[time-nuts] Ronald Held's main question
Hal Murray
hmurray at megapathdsl.net
Tue Dec 18 03:05:29 EST 2007
> Here are 3 Hewlett Packard appnotes that are in the same vain as the
> NBS 140 booklet. In many ways these HP items are better written. The
> first one was written in 1961. The second one is an update (1974), as
> is the third (1976). Each are different and equally worth having on
> the shelf.
Speaking of neat old publications...
It was probably in the late 70s that a friend showed me a small booklet from
NBS.
It was describing how to use TV signals to calibrate your local clock. I
think NBC and HP cooperated.
I think the story was that NBC had their whole network of TV stations locked
to a master clock. It was very stable except for jumps when the phone
company rewired some link. I think they used to measure various sites
monthly and publish the differences between local tick and correct time.
Does anybody remember that one?
--
These are my opinions, not necessarily my employer's. I hate spam.
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