Browse Prior Art Database

Continuity Verification Method

IP.com Disclosure Number: IPCOM000039759D
Original Publication Date: 1987-Aug-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Frassetto, HE: AUTHOR [+2]

Abstract

The types of failure in a continuity checking scheme can be more quickly and accurately determined by analyzing the responses to alternately transmitted high and low logic levels of voltage test signals. When testing for continuity of a circuit card 11 and socket assembly 12 or cabling and its two end connectors 13 and 14, a signal is transmitted from the originating device 10 at alternately high and low voltage logic levels and then compared with the output signal levels. Analysis can indicate signal deterioration due to impedance variations, open circuits or shorting along the continuity path. For card and socket testing, the signal passes through the socket continuity input pin 18, the continuity card input pin 15, card jumper 16, card continuity output pin 19 and socket output pin 17.

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Continuity Verification Method

The types of failure in a continuity checking scheme can be more quickly and accurately determined by analyzing the responses to alternately transmitted high and low logic levels of voltage test signals. When testing for continuity of a circuit card 11 and socket assembly 12 or cabling and its two end connectors 13 and 14, a signal is transmitted from the originating device 10 at alternately high and low voltage logic levels and then compared with the output signal levels. Analysis can indicate signal deterioration due to impedance variations, open circuits or shorting along the continuity path. For card and socket testing, the signal passes through the socket continuity input pin 18, the continuity card input pin 15, card jumper 16, card continuity output pin 19 and socket output pin 17. For cabling, the input signal passes through an originating connector pin, cable conductor, terminal connector output pin, a jumper, output connector input pin, a second cable conductor, and originating connector output pin. This method is useful for the detection and isolation of failures produced by incorrectly seated cards or cables or incorrect rotation of the connected assemblies.

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