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笔者采用沟槽法测试上行通道NPR指标,通过对反向通道中回传光机、接收机NPR指标进行较为全面的测试,并合理运用“零增益”调试法,优化现小区HFC双向网上行通道系统指标,满足三网融合背景下广电云媒体业务的开展。
The author uses the trench method to test the NPR index of the uplink channel, and carries out a more comprehensive test of the NPR index of the back-light receiver and the receiver in the reverse channel, and makes rational use of the “zero gain” debugging method to optimize the HFC bidirectional network Line channel system indicators to meet the triple play in the context of SVA cloud media business.