Hi, I am trying to understand whether a test is required or not.
In EN 55103-2, RF Common Mode Immunity on Signal & Control cables has a caveat that 'screened-cable ports as defined in the standard are deemed to comply with the requirements for this phenomenon without testing' The definition of a screened port: a signal, control or DC power port on a metal-cased apparatus intended for the termination of a braid-screened cable where provision is made for direct, low impedance connection between the cable screen and the case of the apparatus. Where a connector is used it shall provide either a 360 continuous connection between the screen and the case, or at least four points of connection distributed around the connector aperture. NOTE This definition does not permit single-point earthing of the cable screen nor connection of the screen to the case via any component intended to provide an impedance Would this not imply that nearly all types of signal cables (most are screened this way?) would be exempt from this test, or is my understanding totally wrong? (probably the case!) Thanks, Rob. --------------------------------------------------------------------------------------- This email has been scanned for email related threats and delivered safely by Mimecast. For more information please visit http://www.mimecast.com --------------------------------------------------------------------------------------- - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
