SIGNAL TRANSITION

In the modulation of a carrier , a change from one significant condition to another. Note 1: Examples of signal transitions are a change from one electrical current, voltage, or power level to another; a change from one optical power level to another; a phase shift ; or a change from one frequency or wavelength to another. Note 2: Signal transitions are used to create signals that represent information , such as "0" and "1" or " mark " and "space."