CLIPPING :
A signal is said to be clipped when a slight amount of the positive
or negative signal is flattened. The upper signal is an undistorted time
signal. The lower signal is clipped at the bottom.
Clipped Signal
a clipped time signal and a spectrum from a motor 1800 RPM Belt Driving a Fan.
Such a signal can be generated when a machine goes against a stop in
one direction and cannot move further in that direction for a small
period of time. As the cycle continues, the machine moves away from the
stop in a relatively linear manner. The signal is distorted because
the time period for the negative and positive portion is not the same.
Clipping is also a “form of distortion. The frequency spectrum contains
very little harmonic content, because in order for harmonic content to
be generated, the signal distortion must be repeatable.
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