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Twin-Axial Cable Analyzer

IP.com Disclosure Number: IPCOM000044616D
Original Publication Date: 1984-Dec-01
Included in the Prior Art Database: 2005-Feb-06
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

Schmidt, AL: AUTHOR [+2]

Abstract

The purpose of this design is to provide a means of detecting open and short circuits, and phase reversal wiring in twin-axial or similar type of cable. The twin-ax cable analyzer is self-contained and is capable of testing cable up to 5000 feet long. It is powered by a single 9-volt battery 1, (Fig. 1). Light-emitting diodes (LEDs) 2 and 3 detect a malfunction when switch 4 is positioned in the following five-step test positions. For step test position 1, diode 5 must be removed by disconnecting test plug 9. This is done to prevent the diode from burning out in the event of a shorted shield. Each step test position is taken in sequence, and the problem is corrected before proceeding to the next test.

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Twin-Axial Cable Analyzer

The purpose of this design is to provide a means of detecting open and short circuits, and phase reversal wiring in twin-axial or similar type of cable. The twin-ax cable analyzer is self-contained and is capable of testing cable up to 5000 feet long. It is powered by a single 9-volt battery 1, (Fig. 1). Light-emitting diodes (LEDs) 2 and 3 detect a malfunction when switch 4 is positioned in the following five-step test positions. For step test position 1, diode 5 must be removed by disconnecting test plug 9. This is done to prevent the diode from burning out in the event of a shorted shield. Each step test position is taken in sequence, and the problem is corrected before proceeding to the next test. Step Test Position 1: With the switch 4 in the position shown, a short present between the cable's copper color wires 7 and the shield 8 will light LED 2. The cable is good for this step if both LEDs 2 and 3 are off when the switch 4 is pressed. Test plug 9 is then reconnected, and we proceed to step test position 2. Step Test Position 2: If LED 2 is on and LED 3 is off when the switch is not depressed, this will indicate a short between the copper or silver color wires. If LED 2 is off and LED 3 is on when the switch 4 is pressed, we proceed to step test position 3. Step Test Position 3: With switch 4 in the normal position, both LEDs off will indicate a good cable. When switch 4 is pressed, LED 2 off and LED 3 on will indicate a good cond...