I think the reason you use the 12 of 16 points is so you will always have the minimum power necessary (leveled RF field) to insure a field strength of; at a minimum, the level calibrated for. (Due to the EUT distortion effect while running the test).
Michael Sundstrom Nokia Mobile Phones, PCC EMC Technician cube 4E : 390B phone: 972-374-1462 mobile: 817-917-5021 [email protected] amateur call: KB5UKT -----Original Message----- From: EXT [email protected] [mailto:[email protected]] Sent: Wednesday, September 06, 2000 3:24 PM To: Antonio Cinquino Cc: [email protected] Subject: RE: Immunity Testing to EN55024 Antonio, The answer is that power is 180% greater (100% in the carrier, 40% in the USB, and 40% in the LSB). Voltage (RMS) is the square root of 180% (1.8) greater or 134% or 4.02 VRMS. This value may not have much practical sense except as a rough indicator of proper operation since the field value for the standard is determined without an EUT and most EUT's will distort the field when set in position. In addition to distortion the field is also set to +6, -0 dB (100% - 200%) on 12 of the 16 points and who's to say what the field should be within that range at the location of the monitor probe is for any particular frequency. I hope this helps, Paul McCoy ------------------------------------------- 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]
