CISPR 22-2008 Information technology equipment - Radio disturbance characteristics - Limits and methods of measurement《信息技术设备 无线电干扰特性 限值和测量方法》.pdf

1、 CISPR 22Edition 6.0 2008-09INTERNATIONAL STANDARD NORME INTERNATIONALEInformation technology equipment Radio disturbance characteristics Limits and methods of measurement Appareils de traitement de linformation Caractristiques des perturbations radiolectriques Limites et mthodes de mesure CISPR22:2

2、008 INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE COMIT INTERNATIONAL SPCIAL DES PERTURBATIONS RADIOLECTRIQUES THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2008 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or uti

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17、pment Radio disturbance characteristics Limits and methods of measurement Appareils de traitement de linformation Caractristiques des perturbations radiolectriques Limites et mthodes de mesure INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE XCICS 33.100.10 PRICE

18、CODECODE PRIXISBN 2-8318-9960-5INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE COMIT INTERNATIONAL SPCIAL DES PERTURBATIONS RADIOLECTRIQUES Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale 2 CISPR 22 IEC:2008 CO

19、NTENTS FOREWORD.5 INTRODUCTION.7 1 Scope and object8 2 Normative references8 3 Definitions 9 4 Classification of ITE10 4.1 Class B ITE .11 4.2 Class A ITE .11 5 Limits for conducted disturbance at mains terminals and telecommunication ports11 5.1 Limits of mains terminal disturbance voltage 11 5.2 L

20、imits of conducted common mode (asymmetric mode) disturbance at telecommunication ports 12 6 Limits for radiated disturbance 13 6.1 Limits below 1 GHz13 6.2 Limits above 1 GHz .13 7 Interpretation of CISPR radio disturbance limit 14 7.1 Significance of a CISPR limit .14 7.2 Application of limits in

21、tests for conformity of equipment in series production14 8 General measurement conditions15 8.1 Ambient noise15 8.2 General arrangement.15 8.3 EUT arrangement 18 8.4 Operation of the EUT.20 9 Method of measurement of conducted disturbance at mains terminals and telecommunication ports .21 9.1 Measur

22、ement detectors .21 9.2 Measuring receivers 21 9.3 Artificial mains network (AMN) .21 9.4 Ground reference plane .22 9.5 EUT arrangement 22 9.6 Measurement of disturbances at telecommunication ports24 9.7 Recording of measurements 28 10 Method of measurement of radiated disturbance .28 10.1 Measurem

23、ent detectors .28 10.2 Measuring receiver below 1 GHz28 10.3 Antenna below 1 GHz 28 10.4 Measurement site below 1 GHz29 10.5 EUT arrangement below 1 GHz30 10.6 Radiated emission measurements above 1 GHz.30 10.7 Recording of measurements 30 10.8 Measurement in the presence of high ambient signals31 1

24、0.9 User installation testing31 11 Measurement uncertainty31 Annex A (normative) Site attenuation measurements of alternative test sites 42 Annex B (normative) Decision tree for peak detector measurements.48 CISPR 22 IEC:2008 3 Annex C (normative) Possible test set-ups for common mode measurements .

25、49 Annex D (informative) Schematic diagrams of examples of impedance stabilization networks (ISN) 56 Annex E (informative) Parameters of signals at telecommunication ports 65 Annex F (informative) Rationale for disturbance measurements and methods on telecommunications ports68 Annex G (informative)

26、Operational modes for some types of ITE 77 Bibliography78 Figure 1 Test site .32 Figure 2 Minimum alternative measurement site .33 Figure 3 Minimum size of metal ground plane .33 Figure 4 Example test arrangement for tabletop equipment (conducted and radiated emissions) (plan view).34 Figure 5 Examp

27、le test arrangement for tabletop equipment (conducted emission measurement - alternative 1a)35 Figure 6 Example test arrangement for tabletop equipment (conducted emission measurement alternative 1b) 35 Figure 7 Example test arrangement for tabletop equipment (conducted emission measurement alternat

28、ive 2) .36 Figure 8 Example test arrangement for floor-standing equipment (conducted emission measurement) 37 Figure 9 Example test arrangement for combinations of equipment (conducted emission measurement)38 Figure 10 Example test arrangement for tabletop equipment (radiated emission measurement).3

29、8 Figure 11 Example test arrangement for floor-standing equipment (radiated emission measurement) 39 Figure 12 Example test arrangement for floor-standing equipment with vertical riser and overhead cables (radiated and conducted emission measurement) .40 Figure 13 Example test arrangement for combin

30、ations of equipment (radiated emission measurement)41 Figure A.1 Typical antenna positions for alternate site NSA measurements.45 Figure A.2 Antenna positions for alternate site measurements for minimum recommended volume .46 Figure B.1 Decision tree for peak detector measurements 48 Figure C.1 Usin

31、g CDNs described in IEC 61000-4-6 as CDN/ISNs 50 Figure C.2 Using a 150 load to the outside surface of the shield (“in situ CDN/ISN“)51 Figure C.3 Using a combination of current probe and capacitive voltage probe with a table top EUT52 Figure C.4 Calibration fixture54 Figure C.5 Flowchart for select

32、ing test method .55 Figure D.1 ISN for use with unscreened single balanced pairs 56 Figure D.2 ISN with high longitudinal conversion loss (LCL) for use with either one or two unscreened balanced pairs .57 Figure D.3 ISN with high longitudinal conversion loss (LCL) for use with one, two, three, or fo

33、ur unscreened balanced pairs.58 4 CISPR 22 IEC:2008 Figure D.4 ISN, including a 50 source matching network at the voltage measuring port, for use with two unscreened balanced pairs.59 Figure D.5 ISN for use with two unscreened balanced pairs 60 Figure D.6 ISN, including a 50 source matching network

34、at the voltage measuring port, for use with four unscreened balanced pairs61 Figure D.7 ISN for use with four unscreened balanced pairs .62 Figure D.8 ISN for use with coaxial cables, employing an internal common mode choke created by bifilar winding an insulated centre-conductor wire and an insulat

35、ed screen-conductor wire on a common magnetic core (for example, a ferrite toroid)62 Figure D.9 ISN for use with coaxial cables, employing an internal common mode choke created by miniature coaxial cable (miniature semi-rigid solid copper screen or miniature double-braided screen coaxial cable) woun

36、d on ferrite toroids 63 Figure D.10 ISN for use with multi-conductor screened cables, employing an internal common mode choke created by bifilar winding multiple insulated signal wires and an insulated screen-conductor wire on a common magnetic core (for example, a ferrite toroid).63 Figure D.11 ISN

37、 for use with multi-conductor screened cables, employing an internal common mode choke created by winding a multi-conductor screened cable on ferrite toroids 64 Figure F.1 Basic circuit for considering the limits with defined TCM impedance of 150 71 Figure F.2 Basic circuit for the measurement with

38、unknown TCM impedance 71 Figure F.3 Impedance layout of the components used in Figure C.273 Figure F.4 Basic test set-up to measure combined impedance of the 150 and ferrites 74 Table 1 Limits for conducted disturbance at the mains ports of class A ITE.11 Table 2 Limits for conducted disturbance at

39、the mains ports of class B ITE12 Table 3 Limits of conducted common mode (asymmetric mode) disturbance at telecommunication ports in the frequency range 0,15 MHz to 30 MHz for class A equipment.12 Table 4 Limits of conducted common mode (asymmetric mode) disturbance at telecommunication ports in the

40、 frequency range 0,15 MHz to 30 MHz for class B equipment.12 Table 5 Limits for radiated disturbance of class A ITE at a measuring distance of 10 m.13 Table 6 Limits for radiated disturbance of class B ITE at a measuring distance of 10 m.13 Table 7 Limits for radiated disturbance of Class A ITE at a

41、 measurement distance of 3 m.13 Table 8 Limits for radiated disturbance of Class B ITE at a measurement distance of 3 m.14 Table 9 Acronyms used in figures.32 Table A.1 Normalized site attenuation (AN(dB) for recommended geometries with broadband antennas .44 Table F.1 Summary of advantages and disa

42、dvantages of the methods described in Annex C69 CISPR 22 IEC:2008 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE _ INFORMATION TECHNOLOGY EQUIPMENT RADIO DISTURBANCE CHARACTERISTICS LIMITS AND METHODS OF MEASUREMENT FOREWORD 1) The International Ele

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