On Fri, 17 Dec 2004 00:22:38 +1300 Wayne Rooney <[EMAIL PROTECTED]> wrote:
On Thu, 16 Dec 2004 11:51, Fisher, Robert (FXNZ CHC) wrote:
I have 3/4 of a drum of steel core coax cable left (already used heaps with a multi-channel aerial, Sky dish, 6 way splitter then 8 TV outlets)
3 separate coax cables to each multimedia computer for Video plus 2x audio.
Using steel core coax for video is not such a good idea. Video signal is only one volt peak-to-peak and it soon vanishes when pushed through a long run of steel cored coax.
I think what Wayne is trying to say is that composite video (which is a wideband signal) does not travel well in *steel* core conductors as wideband signals do not necessarily travel only in the outer surface of the conductor (see skin effect) as RF signals do.
Steel core (usually copper clad) coax wire is for RF only. Steel for strength, copper clad because that is where the signal is "traveling".
<snip>this http://www.epanorama.net/documents/video/videocoax.html page states:
from which i assume that some coax is ok to carry baseband video.
Yes, most coax is fine to carry composite video, just not copper clad steel core coax. Purists will tell you that steel core is no good for audio either.
Cheers, Rex
