Although linearity is inherent of the specific device and different amplifiers
behave differently, the admissible output level of an amplifier to keep
constatnt its charachteristics of linearity is also related and inversely
proportional to the number and to the amplitude of the input signals. This
concept is for example well known in RF wideband TV amplifiers where the final
effect of applying a lot of modulated carriers of different level at the input
is a reduction of the final S/N on each amplified video signal if the levels
aren?t accordingly reduced. If such a disturbance can?t be named noise in the
strict sense, nevethless it does affect the quality of a signal up to the point
to mask it.
73,
Mauri I4JMY
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