[mythtv-users] Way OT: High-speed Data Service Delivery
jra at baylink.com
Wed Jul 13 13:28:41 UTC 2011
----- Original Message -----
> From: "David Watkins" <watkinshome at gmail.com>
> > The NVP (nominal velocity of propagation) for a copper pair is
> > typically in the order of 70% of the speed of light in a vacuum. When
> > testing copper cable, to get an accurate length you need to set the
> > NVP in the tester - either by using a manufacturers figure, or by
> > testing a sample of cable.
> > And for fibre, yes you are correct.
> ... which also happens to be approximately 70% of the speed of light
> in a vacuum.
Color me surprised; he's right; I'm wrong.
Jay R. Ashworth Baylink jra at baylink.com
Designer The Things I Think RFC 2100
Ashworth & Associates http://baylink.pitas.com 2000 Land Rover DII
St Petersburg FL USA http://photo.imageinc.us +1 727 647 1274
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