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Digital spread spectrum methods and apparatus for testing aircraft wiring

  • US 20040039976A1
  • Filed: 04/23/2003
  • Published: 02/26/2004
  • Est. Priority Date: 04/23/2002
  • Status: Active Grant
First Claim
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1. A method of determining impedance of a wire under test utilizing direct sequence spread spectrum (DSSS) techniques, said method comprising the steps of:

  • (1) coupling the DSSS wire testing system to a connecting end of the wire under test;

    (2) obtaining a pseudo-random noise (PN) code;

    (3) multiplying a test signal by the PN code;

    (4) transmitting the multiplied test signal from the DSSS wire testing system to the wire under test;

    (5) receiving a reflected multiplied test signal from the wire under test; and

    (6) determining a length of the wire under test from the reflected multiplied test signal.

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