The TSA90-3WL-2 is a type of Solid State Radar Transmitter produced by Raytheon. It is used for Ground Control Interceptors, Air Traffic Control (ATC), and other radar applications. The TSA90-3WL-2 is a high power, highly reliable transmitter with an adjustable, variable frequency output from 1.0 to 5.0 GHz, and an output power of up to 3.0 kW. It utilizes a unique patented design to provide excellent phase stability, low harmonic content, and low intermodulation distortion. The unit includes several advanced features, such as Automatic Frequency Correction for precise frequency accuracy, Automatic Gain Control for optimum performance and ease of tuning, and Automatic Timing Generation for precise coordination of multiple radars. The TSA90-3WL-2 is designed to meet MIL-STD-19158B and numerous other specifications.