In relation to cathode-ray tube displays, errors in the signal's amplitude, phase or both that result in small, rapid aberrations in size or position of the image. 2.
Errors of synchronization between a facsimile's transmitter and receiver that are characterized by a raggedness in the copy. 3.
Small spurious variations in a waveform, such as in pulse repetition rate, amplitude, frequency or phase, that stem from supply-voltage variations, mechanical instability and other factors.