Abstract: The present invention provides a method, system, and processor instructions for calibrating a modular wide-range microwave communication system. In an exemplary embodiment, the system includes a first radio module including a calibration memory and radio circuitry (e.g., RF transmit, RF receive, and IF circuitry), a test signal processing system including a signal generator, measuring unit, memory, and a processor with instructions; and (for over-temperature tests) an oven or other controlled environment. The system is operable for controlling the signal generator to supply a series of test signals to the first radio module, for controlling the radio circuitry to set attenuation values, for controlling the measuring unit to determine characteristics (e.g.