Device on cable

Cables which connect USB ports with peripherals such as cameras frequently have black cylindrical objects on the cables a few centimetres away from the USB end. These may be about 10mm in diameter and 20 mm long. Are these things ferrite beads used to eliminate stray pulses in the cable or something else? If so what?

Reply to
Roger Dewhurst
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Yup, just a ferrite bead to reduce RFI.


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Yes. Maybe. Depends.

Reply to
Sjouke Burry

EMI traps, so they can pass FCC/CE radiated interferance specs.


Reply to
John Larkin

John Larkin laid this down on his screen :


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