音频频率数字扫频仪TMS320F2808设计硬件原理图+PCB+软件源码+论文文档资料.zip

音频频率数字扫频仪TMS320F2808设计硬件原理图+PCB+软件源码+论文文档资料,摘要：本文提出了一种基于DSP（TMS320F2808）的音频频率数字扫频仪设计方法，详细介绍了由DSP产生正弦扫频信号和幅频特性测量的核心算法和实现过程。按此方案设计的扫频仪，可测得被测网络在20Hz~20KHz范围内的幅频特性，并将测量结果发送给PC机显示。同时，文中还为C2000设计了幅频均衡算法，并分析了该算法的运算量，给出了C2000能否实时处理的依据。 关键词：数字扫频仪、DSP、幅频特性测量、幅频均衡 Digital Audio-Frequency Sweeper based on TMS320F2808 HeSuqin LvXianliang LiuYong WangXiaoqing (College of Information Science and Technology, Beijing University of Chemical Technology) Abstract：This paper introduces a method of the designing of Digital Audio-Frequency Sweeper based on DSP TMS320F2808.Detailed core algorithm and implementation process are presented here to generate swept sine wave as well as amplitude-frequency response characteristic measurement.Sweeper designed under this scheme can be used to measure the band-stop network’s amplitude-frequency response characteristic in the range of 20Hz~20KHz,and the final result can be transferred to computer to display.In addition,the paper designs an algorithm of amplitude-frequency equalization,and analyses its computation,offers a basis on whether the C2000 can real-time process. Key words：digital sweeper,DSP, amplitude-frequency response characteristic measurement, amplitude-frequency equalization 1 引言 在电子产品生产或调试过程中，经常需要对网络的频率特性进行测量，一般采用频率特性测试仪即扫频仪来测量。扫频仪是一种能在屏幕上直接观察被测网络频率特性曲线的频域测试仪器，它为被测网络的调整、校准及故障的排除提供了极大的方便。本方案利用TMF320F2808高速的运算能力以及丰富的片内外设，设计并制作出了一台适用于音频频率范围的数字扫频仪，它分别使用DSP内部的PWM模块和ADC模块产生扫频信号和采集数据，具有外围电路少，运算效率高，运算精度高以及结果数据可存储等特点。