数字数据通信

中国城市高速数字数据通信网的设计

The Design of High Speed Digital Data Communication Networks in the Cities of China

数字数据通信信息协议

Digital data communication message protocol

基于深圳市数字数据通信网（DDN）的设计经验，讨论了设计DDN网的一般方法和关键问题。

Based on the experiences of designing Shenzhen Digital Data Network ( DDN ), the general design method of DDN and some important issues concerned with it are discussed .

跳频通信、扩展频谱通信、自适应通信及高速数字数据通信系统为“90年代的通信技术”。

Frequency-hopping , adaptive and high-speed digital communication are called as90 's Communication Technique .

现场总线是一种串行的数字数据通信链路，它沟通了生产领域的基本控制过程之间以及与更高层次控制过程的自动化控制设备之间的联系。

Field bus is a kind of serial digital data communication chain way , it links up to basically control in production field and high levels control course in the automation 's control equipment .

远程设计网络协作系统采用DDN数字数据网络通信技术和分布式文件系统，实现异地、多人之间的文字、语音、视频交流和文件共享。

Based on DDN network communication technology and distributed File System , Remote Network Co-operation Design System implemented text , audio and video communication and files exchanges for people in different area .

该传感器将电荷放大、电压幅值放大、A/D转换、数字滤波、数据通信集中在一起，通过DSP实现粗糙度测量过程中数字滤波。

In this sensor , electric charge amplifying , voltage regulating , A / D change , digital filtering and RS232 communication have been integrated .

随着数字通信和数据通信的发展，也随着实际应用的需求发展，复用传输技术向着统一数字传输和数据传输的方向发展。

With the development of the digital communication and the data communication , also with the need of the realistic application , the multiplexing technology directs to unifying the digital transmission and the data transmission .

利用第三代数字PABX组建专用数据通信网

The Construction of a Private Data Communication Network by the Third Genaration Digital PABX