Time domain reflectometer apparatus for identifying the location of cable defects
First Claim
1. A time domain reflectometer apparatus for testing a cable and for cooperation with an oscilloscope or other display apparatus which comprises:
- means for generating a first plurality of pulses which are positive going;
means for generating a second plurality of pulses which are negative going and which are each synchronized with one of said positive going pulses;
means for applying at least one of said pluralities of pulses to the cable being tested;
means for cooperation with the associated display apparatus for providing a display of at least reflected pulses from the cable being tested;
means for bucking said positive going pulses with said negative going pulses to minimize the amplitude displayed of the pulses being supplied to the cable being tested; and
means for delaying at least some of said pulses for substantially synchronizing said negative going pulses and said positive going pulses.
1 Assignment
0 Petitions
Accused Products
Abstract
A time domain reflectometer apparatus for testing a cable and for cooperation with an oscilloscope or other display apparatus which includes structure for generating a first plurality of pulses which are positive going and for generating a second plurality of pulses which are negative going and which are each synchronized with one of the positive going pulses. The apparatus also includes structure for applying at least one of the pluralities of pulses to a cable to be tested, for cooperating with the associated display apparatus, for providing a display of at least reflective pulses from the cable being tested and for bucking the positive going pulses with the negative going pulses to minimize the amplitude displayed of the pulses being supplied to the cable being tested.
74 Citations
8 Claims
-
1. A time domain reflectometer apparatus for testing a cable and for cooperation with an oscilloscope or other display apparatus which comprises:
-
means for generating a first plurality of pulses which are positive going; means for generating a second plurality of pulses which are negative going and which are each synchronized with one of said positive going pulses; means for applying at least one of said pluralities of pulses to the cable being tested; means for cooperation with the associated display apparatus for providing a display of at least reflected pulses from the cable being tested; means for bucking said positive going pulses with said negative going pulses to minimize the amplitude displayed of the pulses being supplied to the cable being tested; and means for delaying at least some of said pulses for substantially synchronizing said negative going pulses and said positive going pulses. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
Specification