In a message dated 12-2-2003, Alex McNeil wrires: > My product is powered via a DC SELV output from an external > Class II power supply i.e. no earth. Does this mean for the > Transverse Balance tests I place my EUT, including the power > supply (or not), on the ground plane with no "ground" > connection to the EUT i.e. not to be connected to the DC ground?
Hi Alex: Does your product have an RS-232, USB, or similar port for connection to a computer? If so, your internal circuits can be tied to ground through this connection. In that case, the ground connection available through that path should be connected to the test circuit ground. If there is no configuration that introduces a connection to ground (answering machines are a good example), the ground plane method of Note 4 is used. Joe Randolph Telecom Design Consultant Randolph Telecom, Inc. 781-721-2848 (USA) [email protected] http://www.randolph-telecom.com This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ieee-pses.org/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
