Digitrax,  Easy DCC, LGB MTS, Lenz, NCE, and ZIMO  are examples of systems that offer full access to decoder settings and these systems will work with BitSwitches.

Braking and acceleration momentum values must be programmed for each engine decoder. The acceleration coefficient CV3 and braking coefficient CV4 need to be set at some value between 3 and 30.  If a value in this range is not programmed the locomotives will respond to the BitSwitch controls with sudden starts and stops.  The higher the number the more gradual the speed change.  A yard switch engine that moves a small number of cars might have a low coefficient and engines on a heavy freight might have high coefficients.

If your layout does/will not have a power booster equipped with a "set speed zero packet generator" assigned to the BitSwitches additional decoder settings ARE REQUIRED. 

The Decoder option settings vary from one manufacturer to the next however the BitSwitches are designed for use with decoders that support "DC conversion", "Asymmetric DCC" and/or "Universal Brake".

To operate in automatic mode using the DC METHOD the locomotive decoders must  be programmable to take advantage of the "Brake on DC" feature built into many NMRA DCC fully compliant decoders.

Digitrax, Lenz, LGB MTS, NCE (2004), TCS (Train Control Systems)  and any others that comply with NMRA DCC standards have a programmable setting for DCC only operation with analog mode conversion OFF and offer "Braking on DC" options.

Decoders that do not accommodate "Brake on DC" or "Asymmetric DCC" require a "Set Speed Zero" command to perform a braking operation.  For this type installation an additional DCC power booster and "Brake Signal Generator" is required. See DC Brake Generator.