What MMR components are located inside the belly radome?

• A. Antenna Assembly, Inertial Measurement Unit (IMU), and Front End Receiver
• B. GPS Receiver, Antenna, and IMU
• C. Front End Receiver, DF-500, and EGI 3
• D. Antenna Assembly, Front End Receiver, and DF-500

Answer: (A)

Inside the belly radome are the parts that directly support the radar’s signal path and provide the inertial reference for stabilization. The Antenna Assembly is the radar’s transmitting and receiving element housed in the radome. Right at the antenna, the Front End Receiver handles the initial RF processing, amplification, and down-conversion to preserve signal integrity. The IMU (Inertial Measurement Unit) supplies the inertial reference data used for motion compensation and accurate radar operation, so it’s placed with the radar front-end components. Navigation or timing subsystems like the GPS receiver, EGI, or other standalone units sit in other avionics bays because they serve broader navigation functions and aren’t part of the radar’s RF chain inside the radome.