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Browse Prior Art Database

Self Contained, Handheld, Electronic I/O Cable Tester

IP.com Disclosure Number: IPCOM000048036D
Original Publication Date: 1981-Dec-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Fosbury, FA: AUTHOR [+2]

Abstract

This tester 10 will significantly reduce the amount of time and labor required to test I/O (input/output) cables 12 (especially long cables which are under raised floors).

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Self Contained, Handheld, Electronic I/O Cable Tester

This tester 10 will significantly reduce the amount of time and labor required to test I/O (input/output) cables 12 (especially long cables which are under raised floors).

The tester is plugged into one end of the I/O cable to be tested and a "wrap-around" card 14 is plugged into the other end of the cable. The tester transmits a signal out on each signal line of the cable selected through a decoder 18 by the count of a counter 20. This signal is transmitted through the card 14 and back to the tester where it lights a specific light emitting diode (LED) in a bank of light emitting diodes 16. If any LED doesn't light, two possible failures exist: a cable line is open, or the signal and ground shield of that cable line have been swapped.

The tester is operated as follows: First, operate the tester without the card 14 plugged in and observe the LEDs 16. If any red LED comes on, there is a signal line shorted to its respective ground shield in the cable.

Then plug the card 14 into the open end of the cable 12 and observe that each of the red LEDs light in sequence. Only one red LED should be on at any time. If more than one red LED is lit, it indicates that there are signal lines shorted in the cable. As pointed out earlier, if any red LED does not come on, either the signal and ground shield are swapped, or the circuit is not complete.

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