摘要：本文阐述了电接口回波损耗(简称回损)的基本概念,介绍了SDH设备电接口回损的ITU国际标准.在此基础上,推荐了用网络分析仪测试电接口回损指标的方法,并且从理论上分析了该测试方法中应该注意的事项.
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