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Spectrum analysis in teaching and research and production practice has a very wide range of applications . Traditional spectrum analyzers easily update exists , expensive and other shortcomings ; With the fast Fourier transform algorithm and digital signal processors, the spectrum analyzer has a very rapid development. In this paper, in-depth study of digital signal processing based on the development of technologies based on DSP and MCU FFT spectrum analyzer. The system can capture the input signal , and data processing in the frequency domain , which can then be displayed on the LCD signal spectrum characteristic curve . The main subject of work is as follows : First, the various parts of the system's hardware components were designed and implemented , including DSP minimum system , A / D conversion module , signal conditioning modules, power modules , LCD display , etc. ; and the preparation of the system software , including the base -2 FFT algorithm of DSP realization of system initialization , A / D converter , serial communication , the touch screen display control. Finally, the system is verified by experiments , the results show that the system in the spectrum analysis of experimental teaching to meet the basic requirements.
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