When interrogated, what frequency signal does the AN/APX-72 generate?

The AN/APX-72 is an identification friend or foe (IFF) transponder used in military aviation. It is specifically designed to respond to interrogations from ground and airborne radar systems. One of the critical functions of this system is to transmit back a unique frequency that aids in distinguishing friendly aircraft from potential threats.

The frequency of 1090 MHz is significant because it is commonly utilized in the aviation sector for transponder operations. This frequency is part of the Mode S transponder specifications and is also used in secondary surveillance radar (SSR) for the identification of aircraft.

By operating at this frequency, the AN/APX-72 facilitates efficient communication and identification processes, ensuring the safety and operational effectiveness of air missions. The choice of 1090 MHz aligns the AN/APX-72's performance with standard aviation practices, allowing it to integrate seamlessly with other air traffic control and defense systems.