DCC

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DCC Terms DCC Components Booster, Command station, Mobile Decoder, Power supply, Stationary Decoder General Address Range, Bus, Cab, Command Control, DCC, Functions, MU consisting, Power Bus, Programming Track, SUSI, Speed steps, Turnout Motors, Voltage drop, Zero stretching Mobile decoder Back EMF, Decoder Connection Method, Decoder-Assisted Consisting, Dither, High-Frequency Decoders, Kick Start, Loco Momentum, NMRA Connector, Speed Table, Supersonic Drive, Transponding Non-DCC Continuous Load, Heat Shrink Tubing, RJ12 Connector, Rule 17, Series Resistor, Stall Current Primary DCC Components Boosters · Command Station · Decoder · Power Supply · Throttles/Cabs

Short Definition

Stands for Digital Command Control

Command Control is a method of controlling locomotives using various schemes, which typically employs a high frequency signal (from audio to radio frequencies) to control a decoder. Most Command Control systems are analog in nature, often employing a constant direct current voltage with a higher frequency, low voltage signal superimposed on it.

Digital Command Control breaks from that model, employing a pure digital signal. There is no analog component on the rails. The decoders are purely digital, not analog in nature. Doing so eliminates many of the problems or limitations inherent with analog systems. The NMRA has defined Digital Command Control, but also allowed room for future expansion and enhancement in the DCC Standard.

See Introduction to DCC if you are just getting started in the world of DCC.