关键词: DSP, 扫频仪, PLL, DDS

Abstract:

A new RF sweeping system based on a structure composed of DSP and FPGA is presented,with focus on the design of the sweeping signal generator.The trend of frequency synthesizers is discussed.After introducing the theory of phase locked loop and direct digital frequency synthesis technology,a design of signal generator based on the DDS+PLL structure is put up in the end of this paper.

Key words: DSP;frequency sweeper;PLL;DDS