Browse Prior Art Database

Electronic Connector/Cable Diagnostic Test Method

IP.com Disclosure Number: IPCOM000114258D
Original Publication Date: 1994-Dec-01
Included in the Prior Art Database: 2005-Mar-28
Document File: 4 page(s) / 87K

Publishing Venue

IBM

Related People

Louie, TJ: AUTHOR [+5]

Abstract

Described is a hardware implementation for testing connectors and cables, as used in Personal Computers (PCs) - RS 232 interface devices. The implementation is an improvement over prior art testing as it includes an electronic connector/cable diagnostic testing method. The method uses tri-state gate technology for isolating various functional circuitry.

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Electronic Connector/Cable Diagnostic Test Method

      Described is a hardware implementation for testing connectors
and cables, as used in Personal Computers (PCs) - RS 232 interface
devices.  The implementation is an improvement over prior art testing
as it includes an electronic connector/cable diagnostic testing
method.  The method uses tri-state gate technology for isolating
various functional circuitry.

      Fig. 1 shows a block diagram of a typical RS 232
interconnection setup as used in the interfacing of various units in
a PC system.  Fig. 2 shows a block diagram of the prior art setup
used to test individual units.  In prior art, the diagnostic wrap
plug, used for testing the RS 232 control circuitry, connected an
individual output driver to an individual input receiver.  This
enabled diagnostic software to test the functional operations of the
RS 232 circuitry but required disconnecting the cable and RS 232
connector.

      The concept described herein improves on the prior art test
setup by implementing an electronic wrap technique while maintaining
compatibility with the prior art hardware and diagnostic testing
procedures.  Fig. 3 shows a block diagram of the electronic wrap.
The drivers and receivers are electronically isolated from the RS 232
connectors through the use of tri-state gates, specifically TGates 1
and 3.  If there is a short, or other defect at the connector, or the
cable, the port is isolated.  This enables the local dri...