When testing conducted emissions on a 3-wire (grounded) product, I disconnect the green wire at the EUT. This removes a significant portion of the common-mode signal.
Because my testing normally involves power supplies with simple, ungrounded, resistive loads, this is easy to do. If a complex system is being tested, this may mean removing several earth ground connections. WARNING The chassis of the EUT may become 'hot' due to AC line-chassis leakage current, so take appropriate precautions. On Tue, 4 Jan 2000 04:20:29 -0600, [email protected] wrote: >Are there "rules of thumb" or a "quick and dirty" means of determining >whether conducted emission noise (or radiated) is common mode or >differential mode? > >Thanks and have a great new year. > >Bob Heller >3M Company -- Patrick Lawler [email protected] --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
