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Specifications

Telemetering Theodolite Model 20-8350 The model 20-8350 is an integral part of the precision measuring system used by the FAA for calibration of INSTRUMENT LANDING SYSTEM (ILS), MLS, VOR, TACAN, VORTAC, and other Navigational Aids. In ILS calibration, an operator tracks the "Flight Check" aircraft and adjusts the theodolite so that the image remains in the crosshairs. The theodolite azimuth and elevation readings are continuously transmitted to the aircraft receiver by a UHF telemetric unit. The received theodolite signal is processed along with the received glide slope signal in the aircraft, to yield a direct reading of the position of the ILS on-course. This information is used to adjust the angle of the ILS glide slope and localizer signal transmission. This ground-based theodolite method is the most precise and accurate calibration method available

Direct all inquires to theodolites@warrenind.com.