Semiautomatic jam-accept (SAJAC) decider for mode-4 of the IFF mark XII

摘要

A semiautomatic jam-accept decider for use in an interrogator responsor installation in which an operator selects a particular range and azimuth of interest. The decider can make Accept decisions concerning IFF Mark XII Mode 4 reply targets in the presence of extraneous signals. Enemy spoofing or jamming of the Mode by transmitting on the reply frequency can also be detected and the position of the enemy aircraft can be determined.