Fwd N Rev... Why? To park, headlight on, smoke working, whistle before movement, or for an operating car to get power for it's action without the loco running off.
Sgaugian posted:PS DCC system output to your rails is neither DC or AC voltage. Said meters do not give you an accurate reading. It is DCC. You need a meter that can read DCC.
To be accurate, it is some form of AC or DC (pulsed). No way around it.
A serial data transmission who's signal is based on the frequency of a change in signal is more accurate. It piggy backs the motor power or via. Radio waves.
Edit was,made to " without" the loco running off