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Computer controlled cable tester

  • US 5,436,554 A
  • Filed: 09/04/1992
  • Issued: 07/25/1995
  • Est. Priority Date: 09/04/1992
  • Status: Expired due to Fees
First Claim
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1. A device for determining interconnections between terminal positions at opposite ends of a cable, comprising:

  • means for testing said terminal positions, comprising;

    means for initializing said terminal positions with a first logic signal;

    demultiplexing means for sequentially selecting each terminal position as a test point and applying a test voltage thereto;

    resistor means for applying a load resistance effective to maintain a second logic signal at each terminal position having the test voltage thereon and to maintain the first logic signal at each terminal position not having the test voltage thereon;

    memory means for storing the logic signals present at all terminal positions during application of the test voltage to the test point; and

    multiplexing means for determining subsequent to removal of the test voltage from the test point the logic signal stored at the memory means for each terminal position, a stored first logic signal being indicative of a terminal position not having a common connection with the test point and a stored second logic signal being indicative of a terminal position having a common connection with the test point;

    connector means for connecting said means for testing with said terminal positions; and

    interface means for interfacing with a computer.

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