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Related to pulse-time modulation: Pulse position modulation, Pulse width modulation, Pulse duration modulation
pulse-time modulation[′pəls ¦tīm ‚mäjə‚lā·shən]
Modulation in which the time of occurrence of some characteristic of a pulse carrier is varied from the unmodulated value; examples include pulse-duration, pulse-interval, and pulse-position modulation. Abbreviated PTM.