Multi-core cable testing device and method for testing the multi-core cable

A multi-core cable testing device configured to specify a correspondence between ends of an insulated wire at both ends of a multi-core cable comprising a plurality of insulated wires, comprising:

• a signal input unit configured to input a test signal by capacitive coupling into one end of the insulated wire selected as a testing object from ends of the plurality of insulated wires being exposed at an end of the multi-core cable;
• a signal output unit configured to output the test signal by capacitive coupling from each end of the plurality of insulated wires being exposed at an other end of the multi-core cable;
• and
• a correspondence specifying unit configured to measure a voltage of the test signal obtained from the signal output unit and to specify an other side end of the insulated wire as the testing object based on a measured voltage,
• wherein at least one of the signal input unit and the signal output unit comprises a signal transmission cable for transmitting the test signal and a substrate configured to be connected to the signal transmission cable,
• wherein a first electrode configured to be connected to a signal conductor of the signal transmission cable is provided on one main surface of the substrate,
• wherein a second electrode configured to be capacitively coupled with an end of the insulated wire is provided on an other main surface of the substrate,
• wherein a transmission path configured to transmit the test signal between the first electrode and the second electrode is provided within the substrate, and
• wherein a shielding layer configured to suppress a noise from entering into the transmission path is provided at the substrate.