Note 1: Pulse amplitude is measured with respect to a specified reference and therefore should be modified by qualifiers, such as "average," "instantaneous," "peak," or "root-mean-square."
Note 2: Pulse amplitude also applies to the amplitude of frequency- and phase-modulated waveform envelopes.
Source: from Federal Standard 1037C
wikipedia.org dumped 2003-03-17 with terodump