The Research On Applied Technology Of Spectrum Analysis And Its System Design Based On ARM

In this paper, we discuss the applied technology, as well as the software and hardware design technology of a spectrum analysis system based on ARM processor.We study the software and hardware design on collection, processing and display of signals, aiming at two applications: the piano tuner and the embedded AC power harmonic analyzer.As for hardware design, we introduced the data acquisition circuit, LCD control circuit, EP7312 processor, memory module, the communicating and testing module; and designed circuit of power supply.As for software design, we implemented the adjustment of magnification of UDA1341, the control of the data collection, FFT, data display program design and curser control; completed the programming of sinc interpolation algorithm.The paper researched the basic functions of the piano tuner and the embedded AC power harmonic analyzer, which is applied in the electrical system. We did some research on the two applications and analyzed the testing data.