DCCWiki, a community DCC encyclopedia.
| DCC Terms
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| DCC Components
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Accessory Decoder, Auto Reverse, Command station, Computer Interface, Consists, DCC Booster, DCC Ready, Decoder, Digital packet, How DCC works, Multifunction Decoder, Power supply, Speed steps, Throttle, XPressNet
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| General
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Address Partitioning, Ammeter, Analog Control of Model Railroads, Bus, Cab, Can Motor, Command Control, Coreless Motor, DCC, DCC in a Box, DMM, Distributed Power, Frog Juicer, Jump Port, LCC, Layout Command Control, Locomotive, MU consisting, Motor, OEM, Phase, Power Bus, Programming Track, Pulse Width Modulation, Rail Size, Serial User System Interface - SUSI, Slots, Standard Dimensions, Turnout Motors, Turnouts with Digital Command Control, Voltage Drop, Zero Stretching
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| Mobile decoder
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Analog Conversion, Back EMF, Decoder Connection Method, Decoder-Assisted Consisting, Digitrax Transponding, Ditch Lights, Dither, Energy Storage, FX Lighting, Functions, High-Frequency Decoders, Kick Start, Lighting Effects, Loco Momentum, Locomotive Interface, NMRA Connector, NMRA DCC Plug for Multifunction Decoders, Power Conversion, Programming Lock, Programming Modes, Quartering, Silent Drive, Snood, Speed Table, USP, XOR
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| Non-DCC
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Primary DCC Components
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| Short Definition
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Digital Command Control
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Command Control is a method of controlling model locomotives using various schemes, typically a high frequency signal (from audio to radio frequencies) is used to control a decoder located in the locomotive. 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 uses a purely digital signal with no analog component on the rails. The locomotive mounted or track connected decoders are purely digital and respond to the DCC messages to generate the signals suitable for the locomotive motor, point motors, signals or other circuits. Doing so eliminates many of the problems and limitations inherent with analog systems. The NMRA has defined Digital Command Control through a number of published standards, there is room for future expansion and enhancement in the DCC Standard.
See Introduction to DCC for more information on DCC.