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From: Mills@udel.edu
Newsgroups: comp.protocols.time.ntp
Subject: Re:  Heath clock timing, and building a WWV clock
Message-ID: <9010310050.aa26570@huey.udel.edu>
Date: 31 Oct 90 05:50:45 GMT
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Nick,

Sorry this is so slow coming. Actually, you can do pretty well with the
Heath RS232 directly. I was able most of the time to realize a small few
tens of milliseconds using a crafted driver and an LSI-11 fuzzball. The
problem was that the clock could sail off into the sunset once it lost
hi-spec lock. I have some fancy graphs and other data around here, but
buried in some years of dust. From what I observed, the problem is
temperature stability of the DAC and VCXO. Undoubtably you could improve
on its algorithms by geeping the decoder and doing good in an outboard
PC.

Dave