Abstract: This system is mainly composed of digital frequency synthesis circuit, modulation circuit, broadband power amplifier, single-chip control system and other modules. This design uses the command of the host computer to give CY7C68013 the frequency phase control word of the DDS chip AD9851 to generate a sine signal. The output of the DDS sine signal and the modulation signal generator realize amplitude modulation in the analog multiplier. Finally, various signals are output after broadband amplification. Through experimental measurement, the output frequency accuracy and stability of the test reached 10-6.
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