CISPR TECHNICAL REPORT 16-4-5 First edition 2006-10 INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE Specification for radio disturbance and immunity measuring apparatus and methods - Part 4-5: Uncertainties, statistics and limit modelling Conditions for the use of alternative test methods IEC Reference number CISPR 16-4-5/TR:2006(E) CISPR/TR 16-4-5:2006+A1:2014 - 2 - Scope. 1 2 Normative references. 3 Terms and definitions.. Symbols and abbreviated terms 4 5 Introduction. 6 Procedure to derive limits for an alternative test method 6.1 Overview..... 6.2 Select the reference quality X .. 6.3 Describe the test methods and measurands 6.4 Determine the deviations of the measured quantities from the reference quantity..... 11 Determine the average values of the deviations .. 6.5 11 6.6 Estimate the standard uncertainties of the test methods .12 6.7 Estimate the expanded uncertainties of the test methods .13 6.8 Calculate the average conversion factor. .14 6.9 Verify the calculated values... .15 6.10 Apply the conversion. 图7 Measurement-based procedure to derive limits for an alternative test method based on measurement results.. .16 7.1 General.. ..16 7.2 Application of practical measurement results to determine the conversion factors Al . .16 Annex A (informative) Remarks on EUT modelling. .20 Annex B (informative) Examples of application of the test method comparison procedure.....21 Annex C (informative) Example of the application of the test method comparison procedure based on measurement results Al. ..51 Bibliography... Figure 1 - Overview of quantities to estimate for use in conversion procedure... .8 Figure 2 - Overview of limit conversion procedure using estimated quantities ... Figure B.1 - Example reference quantity .21 Figure B.2 - EUT and antenna set-up for fully anechoic room emission measurement ........22 Figure B.3 - EuT and antenna set-up for open-area test site measurement.... ..22 Figure B.4 - Radiation characteristics of elementary radiator (left), and scheme of EUT-model (right).... .23 Figure B.5 - Maximum average deviations for 3 m FAR (top) and 10 m OATS (bottom)......26 Figure B.6 - Sample cumulative distribution function .... ..28 Figure B.7 - Uncertainties due to the unknown EUT characteristic for 3 m FAR (top) and10mOATS(bottom).... .30 Figure B.8 - Expanded uncertainties (k = 2) of alternative (3 m FAR, top) and established (10 m OATS, bottom) test methods ..... .....34 Figure B.9 - Maximum average conversion factors for different volumes .... ....35 Figure B.10 - Photo (left) and cut-view of simulation model (right) of the specimen EUT......37 Figure B.11 - Deviations of the specimen EUT: 3 m fully anechoic room (top) and 10 m open area test site (bottom).... ...38 - 3 - CISPR/TR 16-4-5:2006+A1:2014 Figure B.12 - Sample FAR measurement ..39 Figure B.13 - OATS 10 m limit line converted to FAR 3 m conditions. ..39 Figure B.14 - Expanded uncertainties .39 Figure B.15 - Comparison of the measured values with the corrected converted limit . ...40 Figure B.16 - EUT and antenna set-up of 3 m open area test site measurement.. .41 Figure B.17 - Maximum average deviations for 3 m OATS .. Figure B.18 - Uncertainties due to the unknown EUT characteristic for 3 m OATS... ....43 Figure B.19 - Expanded uncertainties (k = 2) of alternative test method [OATS (3 m)]........45 Figure B.20 - Maximum average conversion factors .. ...46 Figure B.21 - Deviations of the specimen EUT: Open area test site (3 m) ....48 Figure B.22 - Sample OATS (3 m) measurement .. Figure B.23 - OATS (10 m) limit line converted to OATS (3 m) conditions. ...49 Figure B.24 - Expanded uncertainties . ...50 Figure B.25 - Comparison of the corrected values with the converted limit, ...50 Figure C.1 - EUTs used during RRT. ...51 Figure C.2 - Measurement results of the asymmetrical voltage using both CDNEs ... Figure C.3 - Measured disturbance field strength ... ...53 Figure C.4 - Conversion factors of all measurements .54 Figure C.5 - Mean co