signal, digital

A signal that is used in such a manner that changes between ranges in a finite set of nonoverlapping ranges of the magnitude of some characteristic convey information.

NOTE 1 The characteristic may be the amplitude, phase, frequency, etc., of a quantity such as voltage, current, impedance, etc.

NOTE 2 For convenience, each range of values can be represented by a single value, i.e., the nominal value.

References: 

JESD99B, 5/07