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

Tom Van Baak (lab) tvb at leapsecond.com
Wed Feb 22 23:48:45 UTC 2012

Examples of GPSDO, rise time, impedance and trigger level:


/tvb (iPhone4)

On Feb 22, 2012, at 2:26 PM, "Poul-Henning Kamp" <phk at phk.freebsd.dk> 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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