PWM
Printpulse-width modulation. The following figure shows a pulse-width modulated waveform.
Figure 38 This figure shows the on part of the pulse as quite narrow, while the off part is much wider. The total width of the pulse is T. You must put limits on the magnitude of the modulating signal so that the pulse does not become too narrow. Very narrow pulses require an inordinately large bandwidth. Note that pulse signals transmitted using ASCII are variable pulse-width signals.
Refer to the RF & Communications Resources page for additional information about RF terminology, fundamentals, and National Instruments RF products.
Information Contributed By: Bob Libbey, Retired RCA Engineer and Adjunct Professor, New Jersey Institute of Technology.
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