专用短波调制解调器在防洪防汛系统中的应用

Application of Special Shortwave Modem in Flood - prevention System

简要比较了几种通讯方式的优缺点,着重分析了目前我国防汛防洪水情遥测系统中所采用的两种短波通信方式,即配有专用短波调制解调器的定时自动改频方式和短波自适应选频方式的使用现状,结果表明在干扰经常很大、信号很弱的防汛防洪水情遥测系统中采用专用调制解调器是可行的。

The article analyses some communication methods, focusing on comparing two of them: automatic time revision on frequency with special shortwave modem, and shortwave automatic frequency adaption. Both of them are presently used in hydrological telemetry systems of China, and the former-turns out to be more feasible to the systems in the areas with strong interferences and feeble signals.