光时域反射仪及其获取测试信号的方法

    公开(公告)号:WO2013097256A1

    公开(公告)日:2013-07-04

    申请号:PCT/CN2011/085214

    申请日:2011-12-31

    Inventor: 田玉周 杨中文

    CPC classification number: G01M11/3145 H04B10/071

    Abstract: 本发明涉及一种光时域反射仪及其获取测试信号的方法,通过使半导体光放大器(SOA)处于开关状态,使得当被测无源光网络返回的测试信号为大信号时,能够通过关闭SOA而不被APD接收,基本消除大信号对后续小信号的干扰屏蔽,之后通过打开SOA接收大信号后的小信号,从而基本消除了测试信号的盲区;并且通过在密集反射的区域的不同位置打开SOA,接收测试信号,从而实现了该区域的所有反射信号的区分。

    一种检测用户线路桥接状态的设备和方法

    公开(公告)号:WO2008031343A1

    公开(公告)日:2008-03-20

    申请号:PCT/CN2007/070286

    申请日:2007-07-12

    CPC classification number: H04M11/062 G01R31/11

    Abstract: An apparatus and method for detecting a bridged state of a subscriber line is provided, in which the apparatus comprises: a line access unit for connecting with a subscriber line to be detected; a pulse signal transmit unit for generating a pulse signal and transmitting it to the subscriber line; a data acquisition unit for acquiring the pulse signal on the subscriber line and its echo wave and storing them to a storage unit; the storage unit for storing the data acquired by the data acquisition unit; control and calculation unit for controlling the pulse signal transmit unit and the data acquisition unit, and determining whether a bridged state is present or not according to the data acquired by the data acquisition unit. The solution realizes detection of a bridged state of a subscriber line, and it can locate the position of the bridge tap precisely, filling the blank of the technique for detecting a bridged state of a subscriber line.

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