Barry, thanks a lot for the information. I'll check the article as soon as possible.
Back to my latest post on the subject, I realized I missed an important detail in the last point (4). Quoting myself: "for NSA measurements and site validation you can limit the job to horizontal polarization (as required by the standards). The antenna calibration in vertical polarization is useful to improve accuracy of emissions measurements of products (using vertical and horizontal AFs). I forgot that both Horizontal and Vertical (not just Horizontal)NSA are required by the standards to validate the test site. So my conclusion is (based on the work by Z.Chen and M.Foegelle): the best choice would be to perform both Horizontal AND Vertical NSA measurement on the standard site (3 antenna method)and use both Horizontal and Vertical AFs of the antennas used for validation of your test site (measured NSA to be within +/- 4 dB of ThNSA). Also the same Horizontal and Vertical AFs can be used during emissions measurements of products to maximize accuracy. I agree with Robert that variations of AFs with antenna height can be important. On the other end I just wonder how to include this AF variations into measurements without unacceptable impact on test time. You should use different AFs for different antenna heights and for each polarization ! Paolo Roncone RCIC - http://www.rcic.com Regulatory Compliance Information Center ------------------------------------------- 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]
