一、试验背景1.多雷达联网在上 DDN 网中遇到的困难。多雷达联网是一项困难和复杂的工程,雷达信号对空管的重要性决定了它需要多重路由的备份,以达到可靠的目的。在各地的雷达信号顺利地从 TES 传到广州后,我们又考虑到用现有的 DDN 网来传输雷达信号,就在此时我们遇到了很大的困难。雷达要求使用 DTE 时钟,而不要使用 DCE 时钟,以免造成目标信号的丢失。DDN 用 DTE 时钟进行误码测试时,可达到10分钟无误码,但用它传输雷达信号时,统计表明坏块比 First, the experimental background 1. Multi-radar network in the DDN network encountered difficulties. Multi-radar networking is a difficult and complex project and the importance of radar signals to ATC determines that it requires multiple routing backups for reliable purposes. After all the radar signals were successfully transmitted from TES to Guangzhou, we also considered the use of the existing DDN network to transmit radar signals. At this time, we encountered great difficulties. The radar requires the DTE clock instead of the DCE clock to avoid loss of the target signal. DDN DTE clock error test, up to 10 minutes without error code, but use it to transmit radar signals, the statistics show that the bad block ratio