增设高通滤波器降低回传链路的影响

A Discussion on Lessening the Impact on Return Link by Adding High-pass Filter

针对维修中遇到的回传信号受噪声和用户使用变压器影响引起的干扰,造成CM丢包和"U互动"产品不能正常上线的现象,找出故障产生的原因并进行分析,提出在光节点、放大器的回传链路上增设高通滤波器,并通过维修案例验证了分析的正确性,同时进一步健全安装规范,减少了干扰的影响。

To deal with the problems of CM loss Packet and ＂U interaction＂products un-functioning on-line, which,found during the maintenance,resulted from noises and customers using a transformers interfering returning signal transmission,reasons of the problems are found and analyzed. One way to solve the problems is to add high-pass filter on the returning link of Optical machine and amplifiers. The method has been approved by several maintenance cases. Besides,more normalized installing is helpful for reducing the interference.