digital data modulation system
digital data modulation system
[′dij·əd·əl ′dad·ə ‚mäj·ə′lā·shən ‚sis·təm] (communications)
A digital communications system in which the information source consists of a finite number of discrete messages which are coded into a sequence of waveforms or symbols, each one selected from a specified and finite set.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.