CAJ | 학술논문

本设计由数字信号发生及伪随机信号发生模块、低通滤波电路、数字信号分析电路等模块构成，通过MSP430单片机及DDs电路产生数字信号，由10M的有源晶振和移位寄存器产生伪随机信号。通过三个截止频率不同的低通滤波器对数字信号进行模拟干扰。伪随机信号发生器输出信号V3的幅度在100mV-TTL内可调。数字信号采用曼彻斯特编码，使其在分析电路中可以在很低的信噪比下从玑。中提取同步时钟信号，利用所提取的同步时钟信号作为示波器的触发脉冲，在示波器上显示出眼图，通过眼图幅度分析数字信号的传输性能。
본설계유수자신호발생급위수궤신호발생모괴、저통려파전로、수자신호분석전로등모괴구성，통과MSP430단편궤급DDs전로산생수자신호，유10M적유원정진화이위기존기산생위수궤신호。통과삼개절지빈솔불동적저통려파기대수자신호진행모의간우。위수궤신호발생기수출신호V3적폭도재100mV-TTL내가조。수자신호채용만철사특편마，사기재분석전로중가이재흔저적신조비하종기。중제취동보시종신호，이용소제취적동보시종신호작위시파기적촉발맥충，재시파기상현시출안도，통과안도폭도분석수자신호적전수성능。
This design by digital signal happen and pseudo--random signal producing module, low pass filter circuit, digital signal analysis circuit module, through the MSP430 microcontroller and create a digital signal, DDS circuit by 10 M active crystals and shift register produce pseudo--random signak Through the three cut--off frequency of different low pass filter to simulate digital signal interference. Pseudo random signal generator output signal amplitude of the V3 in the adjustable within 100 mV - TTL. Digital signal the Manchester, in the coding analysis can be very low in the circuit the signal-to- noise ratio of the extracted from the V2a synchronous clock signal, the use of the extraction of synchronous clock signal transmission signal in the oscilloscope trigger showed on the eye chart, through the eyes of digital signal amplitude analysis transmission performance.