两通道高速数据采集系统

A High-speed Two-channel Data Acquisition System

介绍一种插于PC机上的高速两通道数据采集系统，该系统可用于两路信号的相关分析，采样速度档可调，分别为6MHz、3MHz、1．5MHz和0．75MHz，以适用不同频率的信号，使用了数据存储器与计算机复用存储器技术，计算机可立即对所采集的数据进行处理，免去了数据传送的过程，大大节省了计算机CPU的时间，使用了存储器页面管理虚存技术，解决了大数据量存储器问题。本电路已成功用于两路高速光信号相关运算设备中。

This thesis introduces a high-speed two-channel data acquisition system connected to PC computer. The cquipment can be used for the coherent analysis of two-channelsignals. Besides, the four A/D converter speeds (6MHz, 3MHz, 1. 5MHz and 0. 75Mhz) can be adjusted to adapt to different situations. Apart from that, the data storage memory can be used by the CPU, so that the computer can process the acquired data stored in the data storage memory immediately, thus the data transfer process is omitted, and much time is saved. In addition, the technology of page management of RAM is applied to solve problems in large amount of data storage. This system has been used successfully in an equipment of coherent analysis of twooptic signals.