In message <cc1cc3a4.26adc%[email protected]>, dated Fri, 6
Jul 2012, Ken Javor <[email protected]> writes:
Not quoting chapter and verse of any standard here, but if one were
serious about controlling RE at these frequencies, the best approach
would be controlling common mode conducted emissions on cables attached
to the device, both power and signal.
The limit would be based on the field intensity that would result from
such conducted emissions at a separation which is deemed proper for
typical use. In this manner, all the variables that would befuddle the
test engineer are subsumed in a limit which is based on the maximum
field intensity from a radiating cable; a simple problem susceptible to
a closed form solution.
Indeed: that's what IEC/CISPR standards do, in most cases. One exception
is fluorescent lamps, which are clearly large enough to produce current
loop and thus significant magnetic fields.
--
OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk
Instead of saying that the government is doing too little, too late or too
much, too early, say they've got is exactly right, thus throwing them into
total confusion.
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
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