基于遥测采编系统多通道高精度信号源卡的设计

针对目前信号源输出通道少且方波边沿时间较长的问题,设计了一种多通道高精度信号源卡。系统采用PXI总线实现上位机与信号源卡之间的通信,利用FPGA控制波形数据读取、D/A转换及通道切换,最终实现了32路波形、幅值、频率和相位实时可控的高精度信号输出。测试结果表明,输出信号幅值精度可达0.1%,方波信号边沿时间小于1μs,满足遥测采编器对高精度信号激励的要求。...

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Bibliographic Details
Published in实验室研究与探索 Vol. 36; no. 6; pp. 37 - 41
Main Author 任勇峰 郭佳欣 单彦虎
Format Journal Article
LanguageChinese
Published 中北大学电子测试技术国家重点实验室,太原,030051 2017
Subjects
PXI总线
信号源
多通道
高精度
PXI bus
high precision
多通道
signal source
高精度
multi-channel system
PXI总线
信号源
Online AccessGet full text
ISSN1006-7167

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Summary:针对目前信号源输出通道少且方波边沿时间较长的问题,设计了一种多通道高精度信号源卡。系统采用PXI总线实现上位机与信号源卡之间的通信,利用FPGA控制波形数据读取、D/A转换及通道切换,最终实现了32路波形、幅值、频率和相位实时可控的高精度信号输出。测试结果表明,输出信号幅值精度可达0.1%,方波信号边沿时间小于1μs,满足遥测采编器对高精度信号激励的要求。
Bibliography:multi-channel system; high precision; signal source; PXI bus
REN Yongfeng, GUO Jiaxin, SHAN Yanhu（National key Laboratory for Electronic Measurement Technology, North University of China, Taiyuan 030051 , China）
31-1707/T
Before its work,the telemetry signal sampling encoder needs to input the ideal waveform to verify the accuracy and stability of the system in the self test. For the problems that the signal source is less output channels and exists a long time edge of square wave,we design a multi-channel high-precision signal source card. The system adopts PXI bus to realize communication between the PC and the signal source card,FPGA is used to control reading of waveform data,DA conversion and channel switching. Ultimately,it can output 32-channel waveform whose frequency and phase are controlled by the signal source card with high precision. Test results show that output signal amplitude accuracy reaches 0.1%,square edge time is less than 1us,and the requirements of telemetry signal sampling encoder are all
ISSN:1006-7167