---------------------------------------------------------- Glasair-List Digest Archive --- Total Messages Posted Fri 06/13/08: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:33 PM - Radiated or conducted (MPPalmer@aol.com) ________________________________ Message 1 _____________________________________ Time: 01:33:51 PM PST US From: MPPalmer@aol.com Subject: Glasair-List: Radiated or conducted I've written about this before, so I'm going to keep this brief. (Search the archives for "radiated" and "conducted." There are two ways EMI can get into your radios. Either by the power cord (conducted) or by antenna. (radiated.) I don't know about this PC you're using. If it's battery powered and you get interference, then your problem is radiated. It could be the CPU or the screen drivers. In any event, metal shielding is the usual solution. If you put your gizmo in an enclosed metal box (for testing) and the radio noise goes away, it's radiated. If your PC is powered by the aircraft bus and the noise goes way when powered independently, by a separate battery, then the solution is beads, capacitors, etc. on the power lines. Usually it's easier to squelch conducted than radiated RFI. Of course, it could be a mixture of both kinds of interference. Mike Palmer <>< (obsolete MSEE)


**************
Vote for your city's best dining and nightlife. City's Best 2008.
(http://citysbest.aol.com?ncid=aolacg00050000000102) ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message glasair-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Glasair-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/glasair-list Browse Digests http://www.matronics.com/digest/glasair-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.