> "PEP is the peak of the RF envelope, or the short term peak
"RMS" or work power...What Gary is talking about is the real PEP power, or
the
highest very short term value of RMS power in a speech envelope...."
The following paper by Roy Lewallen, W7EL, accurately and succinctly defines
power:
http://www.eznec.com/Amateur/RMS_Power.pdf
Also note that Roy correctly indicates the term "RMS Power" is fictional in
the case of complex waveforms. Certainly, the RMS values of voltage and
current can be determined when calculating and measuring power -- but trying
to quantify "RMS Power" for a complex waveform is akin to dividing a number
by zero.
In fact, the use of the term "RMS Power" had become so problematic during
the 1970s, that the U.S. Federal Trade Commission made it unlawful to state
"RMS Power" when advertising the rated power specification of audio
amplifiers. Note that the more reputable audio amplifier manufacturers have
since stopped using the term and began using the term "Continuous Power" or
"Minimum Sine Wave Continuous Average Power" pursuant to 16 CFR 432.2(a) in
their specifications.
Paul, W9AC
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