Abstract:
PURPOSE: A measuring system and method of a speed gun, a recording medium are provided to test the speed gun by using carriage wave frequency emitting from the speed gun without a local oscillator or a tuning fork. CONSTITUTION: A speed measuring unit(100) comprises a speed gun(110). The speed gun measures the transition speed of a target by emitting carriage wave frequency for measuring the speed of the target. A modulation means(200) comprises a modulator(210) and a signal source(220). The modulator emits a modulated signal is to the speed measuring unit by modulating the carriage wave frequency and Doppler frequency of the target. The signal source creates continuous waves corresponding to the Doppler frequency and inputs the continuous waves in the modulator.