Re: Interference?

[nickt@xxxx]

Keith,

I find that interesting - can you describe what KAT5 does to the line
level signals to transmit them in analogue form and yet not be
susceptible to mains hum & noise, even with UTP CAT5e cable. I'd
assumed you were transmitting digitally. Like Rehan, it's been
impossible/impractical to avoid parallel runs with mains cables in my
house and coupled with great expectations there will be a degree of
scepticism when I wire up and fire up my (shortly to be delivered?)
KAT5 units for the first time.

On a general note, is proximity to 240v mains cabling likely to
degrade the network performance significantly for any other (non KAT5)
applications?

Any news on IR distribution? If it's not possible to superimpose it
over a KAT5 signal, would it be possible to run it over a separate
CAT5 cable, or use the unused pairs on partly used CAT5's (say the
telephone cables)?

All the best

Nick

--- In kat5-users@y..., "Keith Doxey" <kat5users@d...>
wrote:
> Hi Rehan,
>
> KAT5 is totally Analogue
>
> During development I deliberately tried to introduce interference
and
> failed.
>
> I ran a CAT5 cable down 4 floors with it strapped to a 3phase
240/415V cable
> that was carrying in excess of 200Amps. For the remainder of its
run the
> CAT5 was in able trays carrying a 6" diameter bundle of CAT5's
that
were
> carrying Ethernet, PBX, PSTN and ISDN. Total length of the cable
run was
> about 600 feet. No interference whatsoever.
>
> Please note I am not advocating that you should install cable in
such a
> manner ;-)
>
> I also did a demonstration to Mark McCall where I connected a
portable CD
> player to one end of the CAT5 cable. By listening to either wire of
the pair
> at the distant end the CD was audible over the desired signal. The
output of
> KAT5 was free from the CD signal.
>
> I am not in a position to ship to the States just yet but do have
global
> aspirations ;-))
>
> Keith
>
> -----Original Message-----
> From: Rehan Khwaja [mailto:rehankhwaja@y...]
> Sent: 22 June 2001 21:25
> To: kat5-users@y...
> Subject: [KAT5] Interference?
>
>
> Hi,
>
> I have a few questions.
>
> How does the interference of AC power lines for KAT5 compare with
> that of coax? Am I correct in thinking that the transmission is
> analog rather than digital? If so, does the fact that the wires are
> twisted pair help with interference from the AC?
>
> The background to this is that I'm planning to retrofit my house for
> audio and possibly video. I don't have a problem with the cost of
> coax but I've read that you have to be careful not to run them close
> to power lines or you pick up AC hum. I don't think that I'm going
> to be able to be very careful about where I run the cables, though,
> so I'm looking for a more robust solution. Is KAT5 it?
>
> BTW, I'm happy to see it "in production" - I remember
reading the
> plans for it on your website a while ago. Also, will you ship to
the
> USA?
>
> Thanks,
> Rehan
>
>
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