[time-nuts] Re: HP Z3801A project update

[Bill Beam]

On Thu, 3 Feb 2022 18:44:54 -0800, ed breya wrote:



>It seems to all be working OK, except the reported date is slightly off 
>- by about twenty years. It says it's 20 Jun 2002. The setup isn't 
>optimal - it's just a little GPS antenna propped up against the office 
>door glass. It only sees about three satellites, but enough to lock and 
>report mostly right. I assume the date thing will either fix itself 
>after some time, or maybe it's due to a bug. I've heard of various 
>rollover issues and such over the years, but don't recall any details - 
>since my stuff wasn't working anyway, I didn't pay much attention.

>If anyone happens to know offhand, what the date issues are and any 
>hopefully easy fix, I'd appreciate hearing about it.


The date issue is a 1024 week rollover failure in the GPS receiver.
A fix is to replace the GPS receiver with one that does not have this problem.



Bill Beam
NL7F