Ferrite cable clamp on shielded cable for EMC?

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cupoftea

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Hi,
Its noticeable how monitors etc have ferrite cable clamps on their cables. These are shielded cables.
Is it accepted practice to add ferrite cable clamps to shielded cables?
 

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Thanks, yes , but isnt the cable clamp supposed to equalise go and return currents on the go and return conductors.......not involving the shield conductor?
 

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I presume "go and return currents" is referring to what we call differential cable current in usual terms. It is not influenced by a common mode choke, because the voltage induced by the current in one conductor is also seen by the other. Respectively it can't "equalize" currents.
 

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