On Tue, Mar 17, 2015 at 5:49 AM, Nicklas Karlsson < nicklas.karls...@karlssonwang.se> wrote:
> Yes a shield has two primary jobs but ground impedance is far from zero at > high frequency. The shield will not stay at fixed potential at high > frequency for a noise source. > > If there are three-phase input and a ground Cable summed current thru all > four may be zero but there may be a current flow from the three-phase > Cable to to ground cable. At high frequency impedance in ground cable is > far from zero and there will noise on the ground cable. > > Nicklas Karlsson > True, but as Bertho pointed out, there are a few different ways to skin a cat when it comes to shielding stray noise. Filters can be added to the cable to suppress or allow certain frequency bands, and where and how you ground the shield can also have a lot to do with what you are actually shielding from or for. Mark ------------------------------------------------------------------------------ Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
