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Description of the radar set, tactical-technical characteristics
TPX-46(V)7 IFF interrogator
(click to enlarge: 640·460px = 49 kByte)

Figure 1: The TPX-46(V)7 IFF interrogator as used in the Patriot missile system

frequency: 1030 / 1090 MHz
pulse repetition time (PRT): synchronuous to the primary radar
pulse repetition frequency (PRF): synchronuous to the primary radar
pulsewidth (τ): depending on mode
receiving time:
dead time:
peak power: 1,000 or 2,000 W, selectable
average power:
instrumented range:
range resolution:
hits per scan:
antenna rotation: integrated in the main antenna

AN/TPX-46(V) IFF interrogator

Hazeltine Corporation (a subsidiary of GEC-Marconi Electronic Systems Corporation), Greenlawn, New York

The Hazeltine interrogator sets AN/TPX-46(V)1 to (V)6 are compatible with a wide range of missile systems including the Improved HAWK. Interface capabilities for other radar systems are incorporated. The AN/TPX-46(V)7 equipment (which is used in the Patriot missile system) is different from other versions in that the interrogator is computer-directed for single target evaluation and utilises an IFF antenna that is integrated into the main radar antenna. This IFF antenna is not supplied by Hazeltine. Components and modules from the AN/TPX-46(V)1 to (V)6 receiver/transmitter and processor are used extensively in the AN/TPX-46(V)7.