At 06:56 PM 3/6/00 -0500, Jim Choate wrote:
>> > lasers. Inject a few volt p-t-p 25-45 MHz CW signal (using
Jim, let me be the first to flame incredulously at your
physics. Tim is probably in seizures right now.
Coax is electrical Jim, and the head-end amps listening
to the shared coax looping through da hood saturate if you don't play by
the electrical, analog RF signal-injection rules. The properties of glass
don't figure in.
May all your outlets be GFI'd
>Glass is a good optical conductor, a poor electrical conductor. You're not
>going to get an appreciable current in a glass fiber with ANY power supply
>that Rat Shack might sell. They don't use glass for home cable in general.
>The distribution network might be glass but the curbside distribution
>network will remain copper for quite some time.
>
>Copper, which is a good electrical conductor is a TERRIBLE optical
>conductor.
>
>This is bull-shit FUD.
>
>More to the point, cable systems are protected to several 10's of
>thousands of volts, they're called 'crow-bar circuits'. They're there
>because lightning is quite capable of generating a EMP that can saturate
>the lines (they do it on power lines also). This might blow a circuit
>breaker but it'll reset shortly. If you've EVER been through a Texas
>thunder bumper you'll know exactly what I'm talking about.
>
>You will NOT kill a DA (distribution amplifier) with this attack (they
>have 1:1 matching xfrmrs that eliminate this sort of crap - called a
>balun). You might kill your neighbors cable box (doubtful). When the cable
>rep's check their logs as well as replace that box they'll know within a
>couple dozen to a hundred or so drops as to where the prankster is. So
>they come out put a TDR on the line and record it. The next time you try
>this your ass is hosed. They use this same technique to catch illegal
>cable decoders which have been mod'ed to eliminate their callback ID
>function (they have characteristic impedance behaviours).
>
>
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