Hi, CISPR 22 clause 10.2.1 and Figure 2 really say that you should move antenna back and forth to maintain the specified distance. Words "straight-line periphery" are selected. However, if this variation is e.g. 0.5 m the effect to the field strength at 10 m is only about half a dB so probably there's nothing to worry. I have never seen anyone moving the antenna in practise. regards, Ari Honkala
> -----Original Message----- > From: ext Alex McNeil [mailto:alex.mcn...@ingenicofortronic.com] > Sent: Wednesday, June 13, 2001 11:27 AM > To: 'emc-p...@majordomo.ieee.org' > Subject: EN55022 Radiated Test Set up > > > > > Hi Guys, > > I have a query regarding how the 3M or 10M emissions set up should be > measured. > > EMC Test Houses seem to appply the measurement of the 3M/10M > differently > e.g. measurement can be to the front (or rear) edge of the > EUT, peripherals > and cables setup with Turntable at 0 degrees. This means that > at some point > during Turntable revolutions the EUT will violate the 3M or > 10M rule i.e. > the EUT with peripherals and cables will be less than the > initial measured > distance during turntable movement. > Should the 3M/10M be measured to the periphery of the EUT > after monitoring > the turntable revolution? This would mean that during > Turntable movement the > 3M or 10M is not violated with peripherals or cables, but > also that the > centre of the setup is always more than 3M/10M. > > Any Ideas or better still any simply explained documents (for > all EMC test > procedures) that spells this out very precisely. > > Best Regards > Alex McNeil > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Michael Garretson: pstc_ad...@garretson.org > Dave Heald davehe...@mediaone.net > > For policy questions, send mail to: > Richard Nute: ri...@ieee.org > Jim Bacher: j.bac...@ieee.org > > All emc-pstc postings are archived and searchable on the web at: > http://www.rcic.com/ click on "Virtual Conference Hall," > ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: pstc_ad...@garretson.org Dave Heald davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on "Virtual Conference Hall,"
