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FAQ:NCE Power Pro Command Station and Accessory Decoders

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Issues can arise when multiple commands are sent to the same DCC address in succession. The NCE Power Pro command station formats the digital packet with twelve bits in the preamble, where the NMRA DCC Standard calls for a minimum of 14.

The DCC standard also mandates that a decoder must not accept a preamble of less than 10 bits as valid, or require more than 12 bits.

This can cause a decoder to miss instructions.

Early NCE multifunction decoders also follow this, resulting in issues when RailCom is in operation.