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The design ideas and features of the transmitter control system of the TWP3 boundarylayer wind profiler, which was located in the World Expo Park, are described. Based on the effective mechanism of repetitive judgment and reset, the control system implements the online monitoring of the transmitter, RF switch control, fault location, and selfprotection by the programmable language FPGA and microcontroller. The sampled data for the control circuit includes voltages, temperature and RF signals, and fault information which would be visually displayed on the screen of the transmitter and also be uploaded to computers. The control system played an important role in debugging the transmitter and relative parts of the wind profiler.