This specification covers the design, performance, test , manufacture, and
acceptance requirements for the SN-501/UPX Vtdeo Synchronizer, h e r e i n a f t e r r e f e r r e d t o as the
equipment, for A i r T r a f f i c Control Radar Beacon System (ATCRBS) I d e n t i f i c a t i o n , Friend or -
Foe (IFF) Mark X I I System (AIMS). interrogators.