The T-36M is a rugged, user-friendly, high-precision instrument for rapid functional testing and calibration of military VOR, LOC/GS, MB and low-mid-high-VHF/UHF COMM avionics equipment. The T-36M can be operated in either the knob/switch mode which provides an operator dressed in protective clothing with accurate Go/No-Go testing on the flight line. The keyboard mode also provides full functioning testing and diagnostics. Further flexibility is provided by the T-36M’s ability to store three pre-selected carrier frequencies and output power levels for each operational mode of the unit. These test frequencies can be selected to suit the signal environment at the testing location. The keyboard provides complete control of most parameters, resulting in a high level of unit flexibility.