Abstract: Apparatus for simulating a complex system includes controller means having a sequence of instructions executed by the controller means for providing digital signals representative of a selected state and location of at least one of a plurality of indicators devices, in accordance with a software model of a system being simulated, and for receiving digital signals representative of an occurence and value of rotational motion, for receiving digital signals corresponding to an occurence of making and breaking of a signal path, and for processing said receive signals in accordance with a predetermined sequence of instructions corresponding to the model of the system simulated by the apparatus. The apparatus further includes a mock-up of the system being simulated, including a control panel corresponding substantially to the actual system having disposed thereon switches, indicator lights, and rotational motion devices, such as joy sticks, potentiometers, track balls, and the like.

Abstract: An apparatus for simulating a multimode meter having a pair of test leads, a function switch, and a range select switch is provided. The simulated multimeter apparatus is fed by digital display data signals and provides a numeric display representative of a number corresponding to digital data display signals. Further, the simulated multimeter apparatus is fed by a plurality of switch signals which correspond to predetermined locations of the function and range select switches and fed by an input data stream corresponding to simulated electrical parameter values, related to the values of the functions switch and the range switch, for converting the input data stream into the digital display data signals.