Feasible plans are put forward to solve these problems that exist in the signals of the bidirectional HFC net,and security measures to strengthen upward transmission in cable TV are also discussed.

• 提出了解决双向HFC网中信号存在“汇集干扰”、“汇集均衡”等问题的可行性方案及加强有线电视上行通道安全性的措施。