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Aimed at requirements of signal transmission rate in the UAV data link, the UHF band CP-2FSK modulator design method based on Direct Digital Synthesis technology is given, and hardware circuit implementation of the UHF band CP-2FSK functions, get UHF band modulation signal CP-2FSK of code rate up to 67.2 Mbps baseband signal. The transmission experiments of the image signal in UAV data link had been achieved. It suggested the modulator has many advantages such as low power consumption, high output frequency, high transmission rate, occupied channel bandwidth. It meets the design requirements of the UAV data link telemetry data transmission and achieve high-speed transmission UAV telemetry data downlink.

UHF Band High-Speed CP-2FSK Modulator’s Design