The DS3800NMFA1D1D is a motor field regulator built by General Electronics for use in the Mark IV gas and steam turbine management system. It also serves as a motherboard for the auxiliary board DS3800DMFA. When the motherboard is linked via twenty board-to-board pins placed in the upper right quadrant of the board, ten potentiometers and multiple quick-connect screw mounts are made available to the motherboard.