What are the transmit and receive frequencies of the AN/TPX-42A Secondary Surveillance Radar (SSR)?

The correct answer indicates that the AN/TPX-42A Secondary Surveillance Radar (SSR) transmits at 1030 MHz and receives at 1090 MHz. These frequencies are essential in the operation of SSR systems.

SSR systems utilize these specific frequency bands to communicate with aircraft transponders. The transmit frequency of 1030 MHz is used by the radar to send interrogation signals to the transponders on aircraft. When an aircraft receives this signal, its transponder responds by transmitting a signal back to the radar on the receive frequency of 1090 MHz. This response includes vital information such as the aircraft’s identity, altitude, and other data that are crucial for air traffic control.

Understanding these frequencies is critical for the operation and troubleshooting of SSR systems, as they ensure effective communication between the radar and aircraft transponders in controlled airspace. The selection of these specific frequencies (1030 MHz and 1090 MHz) aligns with international standards for SSR operations, which are designed to minimize interference and optimize the performance of the radar systems.