Monitoring the field during test is appropriate, as a sanity check if nothing else.
However, the actual field calibration and 're-play' requires measuring the forward power, not the signal generator level. Sections 6.2 and 8 of the standard specify forward power. Remember that the forward power is going to vary depending on the match of the load (antenna), so a fixed signal generator output is not necessarily an indication of the forward power. Even with the same antenna, the impedance changes with change in geometry caused by placing an EUT in the field, especially in the near field. Bob Martin, P.E., N.C.E. Intertek Testing Services, NA 978-263-2662 fax 978-263-7086 www.etlsemko.com > ---------- > From: > [email protected][SMTP:[email protected]] > Reply To: [email protected] > Sent: Monday, January 29, 2001 4:28 PM > To: [email protected]; '[email protected]' > Subject: question about EN61000-4-3 > > > forwarding for [email protected] > > ____________________Reply Separator____________________ > Subject: > Author: [email protected] > Date: 1/29/01 11:57 AM > > Hello group, > > I have a question about EN61000-4-3. Specifically about field uniformity > calibration procedure. Is it requirement to document level of forward > power > using directional coupler connected to antenna or is it enough to record > drive level of signal generator. > > Any comments would be welcomed. > > Thanks, > > > S. Lisinker > EMC department > SANMINA. > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > To cancel your subscription, send mail to: > [email protected] > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Jim Bacher: [email protected] > Michael Garretson: [email protected] > > For policy questions, send mail to: > Richard Nute: [email protected] > > ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected] ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected]
