Digital Data Transmission Definition/Meaning:
Digital data uses discrete discontinuous signals to
represent its meanings. In a DC (direct current) transmission system, different
current) values are used to represent the values 0 and 1. A digital transmission
has a very low error rate and can be sent at very high speeds. Weak signals can
be regenerated with low probability of cumulative error. Since all signals are
made up of 0s and 1s, signals from many sources can be readily multiplexed using
digital techniques. See multiplexing.
Digital data can also be transmitted over
AC transmission lines. Since DC signals are blocked out by AC transmission
lines, a different technique is used. AC lines use analog signals to transmit
data; to transform digital data to analog signals a modulator is used.