Computer simulation of MUX bus voltage waveforms under steady state conditions

Digital techniques involving multiplex busing are being advocated in many quarters as a means of satisfying the need for greater reliability, decreased modification cost, and simplified maintenance of airborne avionics systems. This paper documents efforts to develop a computer simulation of a shielded, twisted pair cable multiplex bus with multiple subscribers using steady state equations. The simulation predicts voltage waveforms, driving point impedances, and power distributions for systems compatible with MIL-STD-1553 (USAF). Excellent agreement has been found between laboratory observations and the computer simulation, validating this approach.