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Re: [ProgSoc] Recycling 10Base2



On Fri, 2006-11-17 at 03:55 +1100, Christian Kent wrote:

> On Fri, 17 Nov 2006, Christian Kent wrote:
> 
> > If I rig up some ugly patch connection, can I shove 100 megabits down that 
> > coax somehow?
> 
> eg, using this:
> 
> http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&storeId=10001&catalogId=10001&productId=210471

Wild. I didn't realise that such devices existed.

> It's designed to convert impedance (IANAEE).  Granted, I'll be using it in 
> the opposite direction to how it's intended, and it'll be for high-speed 
> data and not baseband PAL/NTSC, but still?  What are my chances?

Note that such a device ("balun") is likely to be directionless (you'll
use an identical one at each end), your problem is more about bandwidth.
The balun's premise is that there is sufficient bandwidth in a run of
Cat5 to carry an entire composite video signal and that the loss in the
Cat5 (plus the loss in the two baluns) will be acceptable for a
composite video signal (and/or for the viewer/receiver). It is probable
that RG58 has the bandwidth to carry 100Mb/s, but I'd be surprised if
there were sufficient excess bandwidth in the balun itself to reliably
get the signal in and out; 100BaseT NICs are likely to be _FAR_ more
finicky about signal loss than composite video monitors are.

- Raz


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