Based on the analysis and discussion of the management on the laboratory system, equipment, personnel, technology, environmental, the maintenance of all the aspects of the language labs and the construction of the lab...Based on the analysis and discussion of the management on the laboratory system, equipment, personnel, technology, environmental, the maintenance of all the aspects of the language labs and the construction of the labs, this paper expounds bow to manage and maintain the digital language laboratories, puts forward some suggestions on the development and construction of the language labs, and puts forward higher requirements of the laboratory work and the quality of the management staff.展开更多
电子设备集成度的提高对于音频集成电路生产和测试等环节的要求越来越高,尤其是音频数模转换器(Digital to Analog Converter,DAC),本质上为数模混合信号电路,采用数模混合信号自动化测试设备(Automatic Test Equipment,ATE)价格昂贵,...电子设备集成度的提高对于音频集成电路生产和测试等环节的要求越来越高,尤其是音频数模转换器(Digital to Analog Converter,DAC),本质上为数模混合信号电路,采用数模混合信号自动化测试设备(Automatic Test Equipment,ATE)价格昂贵,而采用传统自动测试仪测试覆盖率低、测试时间长,导致这类电路的测试成本较高且测试产能不足。介绍了一种基于现场可编程门阵列(Field Programmable Gate Array,FPGA)和LabWindows的音频DAC电路测试方案,硬件上用FPGA实现音频测试所需的直接数字频率合成(Direct Digital Frequency Synthesizers,DDFS)模块,软件上通过运用LabWindows自带的采样、加窗、快速傅里叶变换(Fast Fourier Transform,FFT)等数字信号处理函数,快速准确地测试各项模拟参数,并在用户界面(User Interface,UI)显示测试值和后台保存测试数据。展开更多
文摘Based on the analysis and discussion of the management on the laboratory system, equipment, personnel, technology, environmental, the maintenance of all the aspects of the language labs and the construction of the labs, this paper expounds bow to manage and maintain the digital language laboratories, puts forward some suggestions on the development and construction of the language labs, and puts forward higher requirements of the laboratory work and the quality of the management staff.
文摘电子设备集成度的提高对于音频集成电路生产和测试等环节的要求越来越高,尤其是音频数模转换器(Digital to Analog Converter,DAC),本质上为数模混合信号电路,采用数模混合信号自动化测试设备(Automatic Test Equipment,ATE)价格昂贵,而采用传统自动测试仪测试覆盖率低、测试时间长,导致这类电路的测试成本较高且测试产能不足。介绍了一种基于现场可编程门阵列(Field Programmable Gate Array,FPGA)和LabWindows的音频DAC电路测试方案,硬件上用FPGA实现音频测试所需的直接数字频率合成(Direct Digital Frequency Synthesizers,DDFS)模块,软件上通过运用LabWindows自带的采样、加窗、快速傅里叶变换(Fast Fourier Transform,FFT)等数字信号处理函数,快速准确地测试各项模拟参数,并在用户界面(User Interface,UI)显示测试值和后台保存测试数据。
