[time-nuts] Neutrinos not so fast? (defectove connector)

[Jim Palfreyman]

Maybe the loose connector meant the clock at one end *never* synced with
the GPS and just happened to be 60ns fast. Tighten the connecter, clock
resyncs, problem solved.

Jim


On 23 February 2012 09:57, Rick Karlquist <richard at karlquist.com> wrote:

> Maybe they checked the connector by replacing the whole
> fiber optic cable with a new one, and while doing that
> had the "oh sh.." moment of realizing the length of the
> old one was 20 meters different than it was supposed to be.
> I think this sort of thing has happened to all of us
> with significant experience.  Or maybe the cable was marked
> with an incorrect length (not due to error by the experimenters)
> and they forgot "trust but verify".  We've probably all
> gotten bit by that one as well.
>
> Rick
>
>
> Poul-Henning Kamp wrote:
> > In message <9A458DBA-3875-43B2-8383-5CA2F86BE8E2 at leapsecond.com>, "Tom
> Van
> > Baak
> >  (lab)" writes:
> >
> >>Could be on the electrical side of the adapter, not the optical
> >>side. It's not impossible to get 60 ns of phase or trigger error
> >>with RF connectors.
> >
> > I don't buy that explanation.
> >
> > It's very hard to get 60 ns *consistent* phase or trigger error,
> > with any kind of connector, almost no matter how you go about it.
> >
> > 20m of extra fiber sounds *much* more plausible.
> >
> > Inventing an excuse about a loose connector to cover up the mistake
> > sounds even more plausible.
> >
> > You really don't want to defend your phd dissertation, being known
> > as the idiot who made a fool of both CERN and SanGrasso in one go.
> >
> > --
> > Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
> > phk at FreeBSD.ORG         | TCP/IP since RFC 956
> > FreeBSD committer       | BSD since 4.3-tahoe
> > Never attribute to malice what can adequately be explained by
> > incompetence.
> >
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