> If you have the wires close enought together, I don't
> see why it should make too much difference if they are
> twisted or not.

Wires are twisted so that each wire in the pair has the same coupling to the
external environment.  You want all external noise to be common mode so that
it can be largely removed in the process of detecting the differential mode
signal.  Even close parallel wires can pick up more differential noise than
a twisted pair.  This can happen especially when the noise sources or
anything that effects an electric field is nearby.  Consider the difference
in capacitance between one wire 1mm from a conductive plate, and similar
wire 2mm from the same conductive plate.


*****************************************************************
Olin Lathrop, embedded systems consultant in Devens Massachusetts
(978) 772-3129, olin@cognivis.com, http://www.cognivis.com

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