Decoder Lock lets you use more than one decoder in a locomotive and be able to program their CVs separately. This is a manufacturer specific CV. The instructions provided here work for Digitrax decoders. If you are using decoders from another manufacturer, please consult your decoder instructions for how this feature works with the decoder you have installed. For example, if you use a mobile decoder and a sound decoder together in your locomotive, you can use the same mobile decoder address during operation and when programming you can unlock only the one you want to program. Since all decoders with the ...