Each DME interrogator has two output buses. One output bus supplies data to the on-side flight control computer (FCC). DME 1 sends data to FCC A and DME 2 sends data to FCC B. the other Output bus supplies data to these units:
· Flight management computer system (FMCS).
· Display electronics units 1 and 2
· Flight data acquisition unit (FDAU).
The FMCS uses DME distance to calculate position updates.
The DEUs use DME distance for displays.
The FDAU receives DME distance and formats it for the flight data recorder.