[time-nuts] What's the lifetime for a HP Z3801a?

[Hal Murray]

mike.cook at orange.fr said:
> Units are three hour periods - See the 58503B Operation and programming
> guide, 5-71 HP were pretty confident in the lifetime of their product as
> they allow  a 4Gig count before rollover. 

Thanks.

I wonder why they tossed in the factor of 3.  Hours seems like a fine unit.  
(With 32 bits, seconds is even reasonable.  That's 136 years, or 68 years if 
you trip over the sign bit.)



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