CM模式的上行通道调试方法与注意事项

CM Mode of The Uplink Channel Debugging Method and Note

在有线电视的双向网络调试中,调试方法直接影响上行通道的稳定性,各节点的电平设置是调试的关键环节,光链路的NPR测试更是设置光链路节点电平的关键参考依据,介绍了双向的节点电平设置与工作原理,并分析了上行通道中影响SNR指标的因素。

In the way of CATV network debugging,the debugging method directly affects the stability of the upstream channel. The level setting of each node is the key link of the adjustment. The NPR test of optical link is the key reference for setting up the node level of optical link. Introducing the node level setting and working principle,and analyze the factors that affect the SNR index in the upstream channel.