Jon Curtis is right about the FCC regulations
in saying that emission measurements
made for European compliance will in general
sufice for FCC regulations, especially if you
are in one of the classes for which fully
compliant measurements are not mandatory
and you are reponding to the statment in
15.103 'Although not mandatory, it is strongly
recommended that the manufacturer of an
exempt device endeavor to have the device
meet the specific technical standards of this
part'. This is however one difference between
the European and American emission standards
that was once only rarely of concern but
becoming of increasing importance. This
is the FCC requirement to extend the range of
measurents to 2GHz if the highest clock
frequency is over 108MHz. The European
tests are limited to 1GHz. Intel have stated
that they expect that by the end of the year
their bottom end processor will be a 120MHz
Pentium. Soon we can expect this difference
to apply to most PC based products.
Nick Rouse
