论文部分内容阅读
问题的提出:近代大多数数字通信系统,都靠同轴电缆和一系列接入远距离馈电(GЛ)电路的无人维护增音机站传输信息.通常,这种晶体管设备用的远距离馈电线路是沿一对导线电路输送直流的.如果这种电缆处于高压线路影响的区域,那么在电缆内部作远距离馈电用的导线里,会感应出频率为50赫的外部电流.这种电流和远距离馈电的工作电流混在一起,就会在增音机
The question is raised: most modern digital communication systems rely on coaxial cables and a series of unattended radio stations that connect to the G-fed circuits to transmit information. Typically, such long-distance Feed lines carry a direct current along a pair of conductor circuits and if such a cable is in the area affected by high voltage lines, an external current of 50 Hz is induced in the wires for long-distance feed inside the cable Current and long-distance feed current work together, it will be in the amplifier