RE: [KAT5] Re: Kat5 versus balun versus component coax

["Phil Harris" <phil@xxxxxxxxxxx>]

Nope - I tried em on opposite ends of a full reel of CAT5 and then told
Keith that it worked. :-)

By the way - I saw a little gizmo in the Lindy catalogue today that is
designed to allow you to compensate for any relative differences in the
lengths of the twisted pairs in CAT5 if you are using them for video and
are
having problems with timings being out.

Phil

> -----Original Message-----
> From: Graham Howe [mailto:graham@xxxxxxx]
> Sent: 15 December 2004 09:47
> To: kat5-users@xxxxxxx
> Subject: RE: [KAT5] Re: Kat5 versus balun versus component coax
>
>
> If I remember correctly, Keith tried his units on either end
> of a full 300m reel of CAT5 and there were still no
> noticeable problems. I've certainly used them on 50m runs and
> they've been fine.
>
> -----Original Message-----
> From: Eddy Carroll [mailto:ecarroll@xxxxxxx]
> Sent: 12 December 2004 23:31
> To: kat5-users@xxxxxxx
> Subject: [KAT5] Re: Kat5 versus balun versus component coax
>
>
> mark_harrison_uk2 <mph@xxxxxxx> wrote:
> > Running three coax cables would, in my view, be a poor idea. One
of
> > the problems with component video is that it can be sensitive to
> > timing errors between the different parts of the signal [ ... ]
> >
> > Using a "component balun" serves two advantages.
Firstly, the good
> > ones ensure that you have identical length signal paths, because
you
> > are using 6 strands (ie - three pairs) within a single CAT5/6
cable,
> > and the length is guaranteed to be the same.
>
> Just a quick note here: actually, the individual pairs in CAT5 are not
> guaranteed to be the same length - in fact, they are usually slightly
> different lengths, because they have different twist ratios
> (this helps
> prevent crosstalk between adjacent pairs)
>
> On long cable runs, this may be significant, depending on the
> application.
> I came across an interesting Usenet thread about this very subject:
>
> http://groups-beta.google.com/group/comp.dcom.cabling/browse_f
rm/thread/
> 9c03cb48bdb5a260
>
> I was particularly surprised to find out how much variance
> there was in
> pair length between cable from different vendors (up to 10% in one
> case!)
>
> Eddy
>
>
>
>
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