MIL-S-81963A, MILITARY SPECIFICATION: SERVOCOMPONENTS, PRECISION INSTRUMENT, ROTATING, COMMON REQUIREMENTS AND TESTS, GENERAL SPECIFICATION FOR (01 AUG 1985) [S/S BY MIL-DTL-81963]., This specification covers common requirements and tests for analog, digital and analog/digital precision instrument rotating servocomponents (synchros, electrical resolvers, electrical, linear resolvers, transolvers, shaft angle encoders, servomotors, tachometer-gearheads). This specification which covers a particular class of servocomponents (for example, synchros), together with the specification sheet detailing the specific requirement for the individual servocomponent.