What are the Guidelines for Testing Ground and Shield Resistance of USB Cables?
Summary
Here is where the test report shows failure: How do I adjust the ground resistance settings for GND and GND+Shield A-Side Link? According to the recent USB Type-C specification, Standard-A to Type-C cables must tie GND+Shield together within each plug so that the shield braid can carry some of the return current. It can also help control electro-magnetic interference (EMI) by ensuring the shield braid is well grounded. Here is what the measurement results may indicate: This evaluation is not effective when the shell contact resistances are very high relative to the roundtrip wire DCR. Additional resources that you may find helpful include the following: If you want more information, feel free to contact us with your questions, or request a demo that applies to your application.
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