" I'm quite impressed that so many PC's are able to pass FCC
limits. When you
> have things like PCI that rely on reflections over a few inches in
> order to
> work and VRAM being clocked at God knows what. Add to that cables all
> over
> the place and big holes in the front, it's suprising the cordless
> phone
> ever had a chance.  "
>
Steve,

Actually, don't be all that impressed with PC... yet.  One of the most
frustrating things about agency testing I found was that the typical PC
we would buy to test our peripheral products on would often over be over
FCC limits when we took baseline measurements.  Believe me - the "art"
of designing EMC compliant equipment for a high volume, low margin
business like the PC industry, is not quite ready for prime time.  Most
companies add the absolute minimum of shielding and suppression
components to impact COGs as little as possible.  I even found that my
mouse designs would pass one day with -3db to spare, and be +2db over
the limit the next day...  Same mouse, same computer, same test
procedure, same test engineer, etc...  The stuff that gets shipped to
the market often barely passes testing, and with the usual tolerances in
components in very high manufacturing volumes, your going to see
computers that aren't in compliance...


Chuck Mauro