JIS C 5402-23-3:2005 English Edition

Electromechanical components for electronic equipment - Basic testing procedures and measuring methods Part 23-3: Test 23c: Shielding effectiveness of connectors and accessories

Abstract

This section of JIS C 5402-23 defines a standard test method for measuring the shielding effectiveness of a connector, or a connector fitted with an accessory and terminated with a cable. The complete assembly has a continues 360 degrees shielding capability throughout its length. This test method utilizes the principle that the intrinsic shielding property of the connector/accessory/cable assembly is its surface transfer impedance which can be expressed as the longitudinal voltage inside the shield, relative to the current flow on the outside shell. The test method is based on two impedance matched circuits. The connector under test is integrated into the secondary circuit 02. The impedance matched injection line of the primary circuit 01, which activates the electromagnetic field, runs parallel to the surface of the test sample under test. This test is suitable for measuring the shielding effectiveness of a connector fitted with triaxial contacts terminated with shielded, twisted pair cables as used in data bus systems.

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