Re: 100Mbit Fast Ethernet Bandwidth

In article <9sadnUZskd-278bZnZ2dnUVZ8tydnZ2d@xxxxxx>,
Charles Turner <charles.turner@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
Thanks, but I don't think you've grasped my point.

If you transmit Fast Ethernet over copper, or anything else for that matter,
with a bandwidth of 100MHz, then at the other end instead of a square wave,
you will get a sine wave, which, I assume will not be acceptable.

Well, in the sense that any waveform can be represented as the sum
of sine waves...

What you would get instead of a square wave would be the sum of the
component sine waves in the frequency range transportable along the
wire. That is not going to be a sine wave unless you were using
a very low bandwidth transport that was acting as a filter.


The bandwidth of the connection determines the risetime of the Ethernet
100MHz square wave (pulses) so the question is simple, what is the minimum
bandwidth to achieve the correct risetime?

http://standards.ieee.org/getieee802/download/802.3-2002.pdf
.

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