Jim <[EMAIL PROTECTED]> wrote on Thursday, February 21, 2008 at 2:03 AM:
> It only takes a little bit of nonlinearity to create distortion products.
For
example, suppose an amplifier with 100W output has enough nonlinearity to
produce a distortion product that is 1 watt. Such an amp's distortion is
only
20dB down. To reach 40 dB down, (.01%) the distortion product would have
to be
only 10 milliwatts.
Not to be forgotten are the distortion products generated by the exciter. A
perfect distortion free linear amplifier driven by an exciter whose IMD
products are only 30db down will produce an output with products down 30db
approximately. A case of 'garbage in - garbage out'.
73,
Geoff
GM4ESD
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