CISPR 16-2-2-2010 Specification for radio disturbance and immunity measuring apparatus and methods - Part 2-2 Methods of measurement of disturbances and immunity - Measurement of d.pdf

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1、 CISPR 16-2-2Edition 2.0 2010-07INTERNATIONAL STANDARD NORME INTERNATIONALESpecification for radio disturbance and immunity measuring apparatus and methods Part 2-2: Methods of measurement of disturbances and immunity Measurement of disturbance power Spcifications des mthodes et des appareils de mes

2、ure des perturbations radiolectriques et de limmunit aux perturbations radiolectriques Partie 2-2: Mthodes de mesure des perturbations et de limmunit Mesure de la puissance perturbatrice CISPR16-2-2:2010 INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE COMIT INTERNATIONAL SPCIAL DES PERTURBATIO

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17、s sur cette publication ou si vous avez des questions, visitez le FAQ du Service clients ou contactez-nous: Email: csciec.ch Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 CISPR 16-2-2Edition 2.0 2010-07INTERNATIONAL STANDARD NORME INTERNATIONALESpecification for radio disturbance and immunity measurin

18、g apparatus and methods Part 2-2: Methods of measurement of disturbances and immunity Measurement of disturbance power Spcifications des mthodes et des appareils de mesure des perturbations radiolectriques et de limmunit aux perturbations radiolectriques Partie 2-2: Mthodes de mesure des perturbatio

19、ns et de limmunit Mesure de la puissance perturbatrice INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE XICS 33.100.10; 33.100.20 PRICE CODECODE PRIXISBN 978-2-88912-097-0INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE COMIT INTERNATIONAL SPCIAL DES PERTURBA

20、TIONS RADIOLECTRIQUES BASIC EMC PUBLICATION PUBLICATION FONDAMENTALE EN CEM Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale colourinside 2 CISPR 16-2-2 IEC:2010 CONTENTS FOREWORD.5 1 Scope.7 2 Normative references7 3

21、 Terms and definitions .7 4 Types of disturbance to be measured12 4.1 General .12 4.2 Types of disturbance .12 4.3 Detector functions .12 5 Connection of measuring equipment .13 5.1 General .13 5.2 Connection of ancillary equipment13 6 General measurement requirements and conditions 13 6.1 General .

22、13 6.2 Disturbance not produced by the equipment under test 13 6.2.1 General .13 6.2.2 Compliance testing 13 6.3 Measurement of continuous disturbance 13 6.3.1 Narrowband continuous disturbance.13 6.3.2 Broadband continuous disturbance.14 6.3.3 Use of spectrum analyzers and scanning receivers.14 6.4

23、 Operating conditions of the EUT 14 6.4.1 General .14 6.4.2 Normal load conditions.14 6.4.3 The time of operation.14 6.4.4 Running-in time .14 6.4.5 Supply .14 6.4.6 Mode of operation14 6.5 Interpretation of measuring results.14 6.5.1 Continuous disturbance .14 6.5.2 Discontinuous disturbance .15 6.

24、5.3 Measurement of the duration of disturbances .15 6.6 Measurement times and scan rates for continuous disturbance 15 6.6.1 General .15 6.6.2 Minimum measurement times 15 6.6.3 Scan rates for scanning receivers and spectrum analyzers .16 6.6.4 Scan times for stepping receivers 17 6.6.5 Strategies f

25、or a spectrum overview using the peak detector18 6.6.6 Timing considerations using FFT-based instruments 21 7 Measurements using the absorbing clamp.23 7.1 Introduction to ACMM 23 7.2 Application of the absorbing clamp measurement method 24 7.2.1 General .24 7.2.2 Frequency range24 7.2.3 EUT unit di

26、mensions24 7.2.4 LUT requirements 24 7.3 Requirements for measurements instrumentation and test site .24 CISPR 16-2-2 IEC:2010 3 7.3.1 General .24 7.3.2 Measuring receiver 24 7.3.3 Absorbing clamp assembly.24 7.3.4 Absorbing clamp test site requirements25 7.4 Ambient requirements26 7.5 EUT leads req

27、uirements 26 7.5.1 General .26 7.5.2 Lead under test26 7.5.3 Leads not under test 27 7.6 Test set-up requirements .27 7.6.1 General .27 7.6.2 EUT set-up 27 7.6.3 LUT set-up.28 7.6.4 Absorbing clamp 29 7.6.5 Measurement cable29 7.7 Operating conditions of the EUT 29 7.8 Measurement procedure 29 7.8.1

28、 Ambient measurement procedure.29 7.8.2 EUT measurement procedure 29 7.9 Determination of disturbance power .31 7.10 Determination of the measurement uncertainty.31 7.11 Compliance criteria31 8 Automated measurement of emissions32 8.1 Precautions for automating measurements.32 8.2 Generic measuremen

29、t procedure .32 8.3 Prescan measurements .33 8.3.1 Purpose.33 8.3.2 Determination of the required measurement time .33 8.3.3 Defining the prescan measurement 33 8.4 Data reduction .34 8.5 Emission maximization and final measurement 34 8.6 Post processing and reporting34 8.7 Emission measurement stra

30、tegies with FFT-based measuring instruments.34 Annex A (informative) Historical background to the method of measurement of the interference power produced by electrical household and similar appliances in the VHF range (see 7.1) .35 Annex B (informative) Use of spectrum analyzers and scanning receiv

31、ers (see Clause 6) .38 Annex C (informative) Scan rates and measurement times for use with the average detector 41 Annex D (normative) Determination of suitability of spectrum analyzers for compliance tests45 Bibliography 46 Figure 1 Measurement of a combination of a CW signal (“NB”) and an impulsiv

32、e signal (“BB”) using multiple sweeps with maximum hold.18 Figure 2 Example of a timing analysis.19 Figure 3 A broadband spectrum measured with a stepped receiver .20 Figure 4 Intermittent narrowband disturbances measured using fast short repetitive sweeps with maximum hold function to obtain an ove

33、rview of the emission spectrum .20 4 CISPR 16-2-2 IEC:2010 Figure 5 FFT scan in segments 22 Figure 6 Frequency resolution enhanced by FFT-based measuring instrument 23 Figure 7 Schematic drawing of the absorbing clamp measurement method .25 Figure 8 Side view of the absorbing clamp measurement set-u

34、p for table top EUTs 28 Figure 9 Side view of the absorbing clamp measurement set-up for floor standing EUTs 28 Figure 10 Process for reduction in measurement time.32 Figure C.1 Weighting function of a 10 ms pulse for peak (“PK”) and average detections with (“CISPR AV”) and without (“AV”) peak readi

35、ng; meter time constant 160 ms43 Figure C.2 Weighting functions of a 10 ms pulse for peak (“PK”) and average detections with (“CISPR AV”) and without (“AV”) peak reading; meter time constant 100 ms43 Figure C.3 Example of weighting functions (of a 1 Hz pulse) for peak (“PK”) and average detections a

36、s a function of pulse width: meter time constant 160 ms.44 Figure C.4 Example of weighting functions (of a 1 Hz pulse) for peak (“PK”) and average detections as a function of pulse width: meter time constant 100 ms.44 Table 1 Minimum measurement times for the four CISPR bands .16 Table 2 Minimum sca

37、n times for the three CISPR bands with peak and quasi-peak detectors.16 Table 3 Sample scheme for an absorbing clamp measurement with an upper frequency bound of 300 MHz.30 Table 4 Sample scheme for an absorbing clamp measurement with an upper frequency bound of 1 000 MHz 31 Table B.1 Minimum sweep

38、time/fastest scan rates39 Table C.1 Pulse suppression factors and scan rates for a 100 Hz video bandwidth42 Table C.2 Meter time constants and the corresponding video bandwidths and maximum scan rates .42 Table D.1 Maximum amplitude difference between peak and quasi-peak detected signals 45 CISPR 16

39、-2-2 IEC:2010 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE _ SPECIFICATION FOR RADIO DISTURBANCE AND IMMUNITY MEASURING APPARATUS AND METHODS Part 2-2: Methods of measurement of disturbances and immunity Measurement of disturbance power FOREWORD 1

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