RADIO ALTIMETER RAMP SIMULATOR
DRA-707 Digital Radio Altimeter Test Set is designed to facilitate testing of digital altimeters by providing simulated aircraft radio altitude information in a flight-line environment. Using operator-defined parameters such as start altitude, stop altitude, and vertical speed, the DRA-707 defines a radio altitude ramp. This information, along with error and fault control information, is transmitted in digital form to drive the radio altitude buses of up to three aircraft altimeters.