" Uncle Peter" wrote in message
...

The amount of RF required to interfere with a sensitive RF
receiver is quite a few magnitudes less than what would
interfere with patient support equipment.

On Tue, 1 Jul 2003 21:28:36 -0400, "DOUGLAS SNOWDEN"
wrote:

Just curious, have any of you had trouble with your neighbors that have had
their homes wired with CAT5 cable? Does it want to act like an antenna and
cause interference (to them and you) ???

Doug N4IJ

Ours generates noise on HF. I have a vertical antenna about 15 feet
from the house and that doesn't help. We didn't have problems with
the old-style coax cable Ethernet. I'll switch to shielded cat-5
cable in the near future.

73,
Jim
N2VX

I will only speak for what I know, have observed in the field or tested in
the biomed labs.

When testing commenced in 1992 at Mercy, we found the majority of the
problems were with
switching power supplies that powered the network and computer equipment.
Our discoveries and test results forced Compaq to recall equipment for noise
and
improper grounding [One bad Chinese supplier - they were using several at
that time].

Coax [10-Base-T] will limit you to standard Ethernet speed (10 Mb) - and is
subject to the
quality of cable and its coax shielding - which is why Belden has specific
model number of Thick and Thin
Ethernet.

Fiber Optic is ideal - but you have termination costs and again power issues
with equipment.

I have not yet tested any of the upcoming 802.3af equipment ("power for
phones") -
yet another potential to examine in the "wiring closet".

Greg
w9gb
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