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Doesn't the radio interference come from the cable benig some
multiple of
the wavelength the signal is being xmitted on?
That
being the case, can't you just alter the length of the cable such that it
is no
longer said multiple?
I
suppose though that doing that is the equivalent of 'tuning' it so you just
end
up with a different station being picked up :-/
Tony
The easy answer is - buy a pair of KAT5 modules. I've not seen any
cheaper solution...
-----Original Message-----
From: Amar Nagi
[mailto:amar@xxxxxxx]
Sent: Fri 31/05/2002 15:30
To: ukha_d@xxxxxxx
Cc:
Subject: RE:
[ukha_d] RE: cat5 cable picking up radio ?
what can i do to my audio signal to make it balanced
so i don't pick the radio signals ?
-----Original Message-----
From: Mark
Harrison [mailto:Mark.Harrison@xxxxxxx]
Sent: Fri
31/05/2002 13:07
To: ukha_d@xxxxxxx
Cc:
Subject: RE: [ukha_d] RE: cat5 cable picking up radio
?
Well - there are a few applications which use the 8 cores separately
rather than as 4 balanced pairs. STP might come in useful there.
Also, it's useful in factory / industrial environments. If you want
cable to go anywhere near a blast-furnace, say.
I've never seen an application that called for it in a
domestic / office environment.
M.
-----Original Message-----
From: BUTLER,
Tony, FM [mailto:tony.butler@xxxxxxx]
Sent: Fri 31/05/2002
12:58
To: 'ukha_d@xxxxxxx'
Cc:
Subject: RE: [ukha_d] RE: cat5 cable picking up radio
?
Mark,
If CAT5 is designed for balanced signals, which are (relatively)
immune to interference, what then is the point of screened
CAT5?
It's a question I've been meaning to ask for a while (following a
previous discussion about ethernet being balanced) and you've just
reminded me of it.
Any ideas?
Tony
You CAN, if you really feel like it, wrap the CAT5 cable in
kitchen foil, and ground one end, which will help a bit...
... But it's fundamentally a crap way to do it. If you're going
to carry signals over CAT5, then they need to be balanced. The whole
point of balancing is in the rejection of interference (such as
shortwave radio.)
Doesn't matter whether you're talking 10baseT ethernet, 100baseT
ethernet, or KAT5 audio... balancing is the only way to go.
M.
-----Original Message-----
From: Amar
Nagi [mailto:amar@xxxxxxx]
Sent: Fri 31/05/2002 12:37
To: ukha_d@xxxxxxx
Cc:
Subject: cat5 cable picking up radio
?
I lay as a temporary solution a cat5 cable and i run audio
down
it to the a set of mulitmedia pc speakers in the bedroom.
and for some reason it picks up radio. I can hear
a radio program in the audio.
any ideas ?
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