Topband: CAT5 cable as feeder for reversable Beverage
billw at waveform.net
Thu Apr 14 10:33:40 PDT 2011
There is a test used when installing this cable commercially called
"PowerSum NEXT". If you look that up you should be able to get an idea
of the coupling between pairs. If I remember correctly it's around -45dB
or so between near-end pairs, but it's been a looong time since I dealt
with that (our company only does fiber now, which has essentially zero
coupling between adjacent optical strands so crosstalk isn't an issue).
If you can find outdoor-rated Cat6 cable it will have better isolation
between pairs due to the internal separator within the cable.
> Is it worth trying to use outdoor CAT5 to feed reversible Beverage?
> There are 4 twisted pairs inside, paralleling 2 for both directions
> give something close to 50 or 75 ohms.
> Any idea what is coupling between pairs? Any other risks?
> 73 Arunas LY2IJ
> UR RST IS ... ... ..9 QSB QSB - hw? BK
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