Age for the 465L Remote Communications Central AN/FYQ-4

This paper discusses the techniques utilized in the design of a digital communications system that provide continuous system monitoring during operation, indicates a faulty replaceable assembly, and switches to redundant sections when necessary. Also, the special test sets that provide the capability of fault isolation in a faulty assembly to a small repairable subassembly are discussed. The monitoring and test capabilities provide a means of rapid repair of the system thus maintaining communications with minimum down time and spares.