Test device for multiconductor cable

Abstract

Abstract PURPOSE:To automatically confirm the twisted state of a twisted pair by inputting a signal to the twisted pair from a differential driver and monitoring the electric current induced in another twisted pair by means of a differential receiver. CONSTITUTION:An oscillator 1 outputs a signal to a twisted pair in a cable 7 to be tested through one differential driver 3 selected by a driver/receiver switching circuit 2 and another driver 3 is kept in a high-impedance state. When the twisted pair to which the signal is outputted is properly wired, the signal is only transmitted to the differential receiver 4 paired with the driver 3 outputting the signal, but, when the wiring is not proper, two or more receivers operate. Therefore, when a signal decision circuit 5 takes the AND of the OR of outputs of all receivers which are not connected with the driver and the output of the receiver paired with the driver, the propriety of the wiring or the twisted pair connected with the driver can be decided.

Inventors

• 👤 Kouichi Mimotosuga
• 👤 孝一 三本菅

Bibliographic Details