High-speed random equivalent sampling system for time-domain reflectometry
Time domain reflectometry (TDR) has been commonly used for testing cable for years. The waveform attenuation and distortion of TDR pulse is an inherent problem for the correct definition of arrival time and propagation velocity of traveling wave. For the purpose of obtaining the required information of incident and reflected pulse waveform, a highspeed random equivalent sampling (RES) system with 65ps sampling resolution is proposed for a high-resolution TDR. The problem of data storage and communication caused by high sampling rate is solved by using both digital signal processors (DSP) and field programmable gate arrays (FPGA). The detail architecture of the implemented circuit and software is described, including the control logic and data processing algorithm. The real-time sampling rate of the system is up to 125MHz, with 15.4GHz equivalent sampling bandwidth. The test results show that the proposed system can be used as a high-speed data acquisition and processing unit.
Time domain reflectometry random equivalent sampling high-resolution data acquisition cable
Song Jian-hui Yuan Feng Ding Zhen-liang
Instrument Science and Technology, Harbin Institute of Technology, Harbin, 150001, China
国际会议
第五届仪器科学与技术国际学术会议(ISIST 2008)Fifth International Symposium on Instrmentation Science and Technology
沈阳
英文
1-6
2008-09-15（万方平台首次上网日期，不代表论文的发表时间）