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2. 发明授权

US4277740A Cable tester for multipair cables 失效
标题翻译：多路电缆电缆测试仪
公开(公告)号：US4277740A
公开(公告)日：1981-07-07
申请号：US87433
申请日：1979-10-22
申请人： Kenneth B. Parks
发明人： Kenneth B. Parks
IPC分类号： G01R31/02
CPC分类号： G01R31/023
摘要： Multipair cable testing apparatus for detecting transpositions and reversals in the cable pairs includes master unit (100) located at one end of the cable and remote unit (200) located at the other end.Master unit (100) comprises: pair address generator (120) for automatically and sequentially stepping through a grouping of pairs simultaneously terminated by master unit (100); sequencer (110) to sequentially connect, during each testing step, a pair under test to voltage measurement means (150) and then to resistance measurement means (160); indicator means (170) to display the results of the two measurements; and communicating means (175) to transmit the terminal address of the pair under test to remote unit (200).Remote unit (200) comprises: decoder means (210) for receiving the address information of the pair under test; means (220) for terminating the grouping of pairs at predetermined addresses and placing a voltage on all pairs located at the predetermined address except for the pair having the preselected address; and polarity-sensitive resistance means (226,227) connected across each pair and oriented to provide low resistance for a reversal.Indicator means (170) signals a transposition whenever voltage means (150) measures a voltage greater than a predetermined threshold and signals a reversal whenever resistance means (160) measures a resistance less than a predetermined level.Cross-connect apparatus (300) effects detection of transpositions between different pair groupings, and extends automated testing capability to any number of groups.
摘要翻译：用于检测电缆对中的转置和反转的多电缆测试装置包括位于电缆一端的主单元（100）和位于另一端的远程单元（200）。主单元（100）包括：对地址发生器（120），用于自动并顺序地跨越由主单元（100）同时终止的一组对; 在每个测试步骤期间，顺序地将一对被测试的电压测量装置（150）连接到电阻测量装置（160）; 指示装置（170）显示两次测量结果; 以及将被测对的终端地址发送到远程单元（200）的通信装置（175）。遥控单元（200）包括：解码装置（210），用于接收被测对的地址信息; 用于在预定地址处终止对分组的装置（220），并且将位于除了具有预选地址的对之外的预定地址处的所有对上放置电压; 和极性敏感的电阻装置（226,227），其连接在每一对之间并且被定向以提供用于反转的低电阻。每当电压装置（150）测量大于预定阈值的电压并且每当电阻装置（160）测量小于预定电平的电阻时，指示装置（170）发信号通知转换。交叉连接装置（300）可以实现不同配对组之间的转置检测，并将自动测试能力扩展到任意数量的组。

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