| 摘要 |
A portable battery-powered audio cable tester having two jacks for connecting with the cable to be tested. A signal light and push-button "short" switch are connected with the battery such that the light will go on when a cable not having a "short" is connected to the tester and off when the "short" switch is opened, indicating such absence of a short. A second push-button "check" switch is connected across the jacks such that the tester can be checked when a malfunctioning cable is connected and the signal light fails to operate. A three position toggle switch, for indicating whether the malfunction is due to a broken conductor or an open shield, is connected so as to alternately bypass the conductor and ground wires, following release of the "check" switch. The normally open toggle switch is flipped upwardly or downwardly, such that the signal light will flash at one of the two readings, i.e., broken conductor or open shield.
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