SIGINT planes vs. radioisotope mapping

[Bill Frantz]

At 8:52 PM -0700 6/5/03, Randy wrote:
>And if any of the copper is carrying digital data, square waves are hugely
>rich in harmonics well up into the
>MHz bands, and would therefore tend to radiate better from any above-ground
>wires between poles, possibly
>even roadside pedestals.

Note that the copper in your Cat 5 Ethernet cable is treated as a
transmission line.  It is correctly terminated at both ends, so there is
very little RF radiation.  If there were a lot of RF, it would interfere
with things like TV, cell phones etc.

Cheers - Bill


-------------------------------------------------------------------------
Bill Frantz           | Due process for all    | Periwinkle -- Consulting
(408)356-8506         | used to be the         | 16345 Englewood Ave.
frantz at pwpconsult.com | American way.          | Los Gatos, CA 95032, USA