Term: Ghost Throttle
A Ghost Throttle is a condition which can occur when using Digitrax DCC Systems.
The software in the command station has the ability to perform Slot Following, where two throttles can act on that slot. That slot contains the parameters for a specific locomotive's operation (speed, direction, etc.) This feature can be used to train new operators and is perfectly normal. The Ghost Throttle occurs when the throttles were not dispatched correctly.
At a later point someone takes control of the locomotive with their throttle, and there is another inactive throttle accessing that slot. This causes random operational issues when the unknown throttle sends information to the command station.