The IfThenElseFSM model shown using Vergil, the Ptolemy II schematic editor:
The inside of the "FSM ModalModel +1/-1 Gain" component:
The "FSM ModalModel +1/-1 Gain" component has a "gainPlus" component:
and a "gainMinus" component:
Going back up to the top level, the inside of the "DDF +1/-1 Gain.ramp":