1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 11452-11:2010Road vehicles Componenttest methods for electricaldisturbances from narrowbandradiated electromagneticenergyPart 11: Reverberation chamberBS ISO 11452-11:2010
2、 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO11452-11:2010.The UK participation in its preparation was entrusted to TechnicalCommittee AUE/16, Electrical and electronic equipment.A list of organizations represented on this committee can beobtained on request
3、 to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2010ISBN 978 0 580 60625 0ICS 33.100.20; 43.040.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This Briti
4、sh Standard was published under the authority of theStandards Policy and Strategy Committee on 30 September 2010.Amendments issued since publicationDate Text affectedBS ISO 11452-11:2010Reference numberISO 11452-11:2010(E)ISO 2010INTERNATIONAL STANDARD ISO11452-11First edition2010-09-01Road vehicles
5、 Component test methods for electrical disturbances from narrowband radiated electromagnetic energy Part 11: Reverberation chamber Vhicules routiers Mthodes dessai dun quipement soumis des perturbations lectriques par rayonnement dnergie lectromagntique en bande troite Partie 11: Chambre rverbrante
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9、tariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2010 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writi
10、ng from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2010 All rights reservedBS ISO 1145
11、2-11:2010ISO 11452-11:2010(E) ISO 2010 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Terms and definitions .1 4 Test conditions 3 5 Test location 3 5.1 General .3 5.2 Reverberation chamber 3 6 Test apparatus and instrumentation .3 6.1 Isotropic E-
12、field probe 3 6.2 RF signal generator.3 6.3 Transmitting and receiving antennas4 6.4 Power amplifiers4 6.5 Spectrum analyser 4 6.6 Directional coupler 4 6.7 Power meter .4 6.8 Computer control 4 6.9 Stimulation and monitoring of the DUT 4 7 Test set-up .5 7.1 General .5 7.2 Ground plane and DUT grou
13、nding 5 7.3 Power supply and AN5 7.4 Location of DUT and wiring harness.6 7.5 Location of load simulator6 7.6 Location of transmitting antenna 6 7.7 Location of receiving antenna .6 8 Test method .8 8.1 Test plan.8 8.2 Test procedure.8 8.3 Test report9 Annex A (informative) Function performance stat
14、us classifications (FPSC) .11 Annex B (normative) Mode tuning chamber characterization .12 Annex C (normative) Determination of chamber loading effects 18 Annex D (normative) Artificial network 21 Bibliography23 BS ISO 11452-11:2010ISO 11452-11:2010(E) iv ISO 2010 All rights reservedForeword ISO (th
15、e International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committ
16、ee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechn
17、ical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member
18、bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying
19、any or all such patent rights. ISO 11452-11 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 3, Electrical and electronic equipment. ISO 11452 consists of the following parts, under the general title Road vehicles Component test methods for electrical disturbances from n
20、arrowband radiated electromagnetic energy: Part 1: General principles and terminology Part 2: Absorber-lined shielded enclosure Part 3: Transverse electromagnetic mode (TEM) cell Part 4: Harness excitation methods Part 5: Stripline Part 7: Direct radio frequency (RF) power injection Part 8: Immunity
21、 to magnetic fields Part 9: Portable transmitters Part 10: Immunity to conducted disturbances in the extended audio frequency range Part 11: Reverberation chamber BS ISO 11452-11:2010ISO 11452-11:2010(E) ISO 2010 All rights reserved vIntroduction Immunity measurements of complete road vehicles can g
22、enerally only be carried out by the vehicle manufacturer, owing to, for example, high costs of absorber-lined shielded enclosures, the desire to preserve the secrecy of prototypes or a large number of different vehicle models. For research, development and quality control, a laboratory measuring met
23、hod can be used by both vehicle manufacturers and equipment suppliers to test electronic components. This test method is based on parts of IEC 61000-4-21 and RTCA/DO-160E. BS ISO 11452-11:2010BS ISO 11452-11:2010INTERNATIONAL STANDARD ISO 11452-11:2010(E) ISO 2010 All rights reserved 1Road vehicles
24、Component test methods for electrical disturbances from narrowband radiated electromagnetic energy Part 11: Reverberation chamber 1 Scope This part of ISO 11452 specifies a reverberation chamber method for testing the immunity (off-vehicle radiation source) of electronic components for passenger car
25、s and commercial vehicles, regardless of the propulsion system (i.e. spark-ignition engine, diesel engine, electric motor). The device under test (DUT), together with the wiring harness (prototype or standard test harness), is subjected to an electromagnetic disturbance generated inside the reverber
26、ation chamber, with peripheral devices either inside or outside the chamber. It is applicable to disturbances from continuous narrowband electromagnetic fields. The test is performed using the tuned mode method. 2 Normative references The following referenced documents are indispensable for the appl
27、ication of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 11452-1, Road vehicles Component test methods for electrical disturbances from narrowband radiated electromagn
28、etic energy Part 1: General principles and terminology 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 11452-1 and the following apply. 3.1 antenna characterization factor ACF ratio of the average received power to forward power obtained in the anten
29、na characterization NOTE See Clause B.5. 3.2 chamber characterization factor CCF normalized average received power over one tuner rotation with the DUT and supporting equipment present NOTE See Clause C.3. BS ISO 11452-11:2010ISO 11452-11:2010(E) 2 ISO 2010 All rights reserved3.3 chamber loading fac
30、tor CLF ratio of the antenna characterization factor to the chamber characterization factor NOTE 1 See Clause C.4. NOTE 2 It is a measure for the additional loading of the chamber due to the test setup including, for example, the DUT and the support equipment. 3.4 lowest usable frequency LUF lowest
31、frequency for which the field uniformity requirements are met NOTE The LUF is determined during the characterization of the chamber in accordance with Annex B. 3.5 maximum chamber loading factor MLF maximum chamber loading factor for which the field uniformity has been demonstrated using the procedu
32、re defined in Clause B.7 3.6 reverberation chamber high Q shielded room (cavity) whose boundary conditions are changed via one or several stepped rotating tuners NOTE This results in a statistically uniform electromagnetic field. 3.7 support equipment equipment associated with performing an EMC test
33、 on a DUT including (but not all inclusive) load simulator, wiring harnesses, power supply (or batteries), DUT monitoring equipment including fibre optic interface modules and TV camera 3.8 test bench polystyrene block(s) with a minimum height above the ground floor of /4 at the lowest frequency NOT
34、E Typically a 1 m high support is used. 3.9 tuner large metallic reflector capable of changing the electromagnetic boundary conditions in a reverberation chamber as it rotates or moves NOTE As the tuner moves, the nulls and maximums in the field change location, ensuring the device under test (DUT)
35、is exposed to a statistically uniform field. 3.10 working volume volume within the reverberation chamber that contains the test bench, the DUT, the harness, the support equipment that is located on the test bench, and the receiving antenna BS ISO 11452-11:2010ISO 11452-11:2010(E) ISO 2010 All rights
36、 reserved 34 Test conditions The applicable frequency range of the test method is from LUF (see Clause B.6) to 18 GHz. The user of this part of ISO 11452 shall specify the test severity level or levels over the frequency bands. Typical test levels are suggested in Annex A. Standard test conditions a
37、re given in ISO 11452-1 for the following: test temperature; supply voltage; modulation; dwell time; test signal quality. 5 Test location 5.1 General The test shall be performed in a reverberation chamber. 5.2 Reverberation chamber The chamber shall be large enough to test the DUT including the test
38、 bench, the support equipment, and the receiving antenna within the chambers working volume. NOTE 1 The chamber size will influence the lowest useable frequency (LUF). This working volume typically has a cuboid shape, but this is not a requirement. The reverberation chamber shall contain at least on
39、e mechanical tuner to stir the electromagnetic fields inside the chamber. The mechanical tuner(s) should be as large as possible with respect to overall chamber size and working volume considerations. In addition each tuner should be shaped such that a non-repetitive field pattern is obtained over o
40、ne revolution of the tuner. NOTE 2 The number, size and shape of the tuners will influence the lowest useable frequency (LUF). After initial construction, the reverberation chamber shall be characterized in accordance with Annex B, and fulfil the field uniformity requirements of Table B.2. The LUF o
41、f the reverberation chamber is determined during this initial characterization. Following any major modifications, a new chamber characterization shall be carried out again. Changes to the tuners shall be considered a major modification. 6 Test apparatus and instrumentation 6.1 Isotropic E-field pro
42、be The field probe shall be capable of measuring electric field strength in three orthogonal axes. 6.2 RF signal generator The RF signal generator shall be capable of covering the specified frequency bands and modulations. BS ISO 11452-11:2010ISO 11452-11:2010(E) 4 ISO 2010 All rights reserved6.3 Tr
43、ansmitting and receiving antennas Linearly polarized antennas capable of satisfying the frequency requirements shall be used for transmitting and receiving, respectively. The antenna efficiency should be at least 75 % (log periodic and horn antennas typically fulfil this requirement). The use of mul
44、tiple antennas to cover the complete frequency range of the reverberation chamber is allowed. 6.4 Power amplifiers The power amplifiers are used to amplify the RF signal and provide the necessary power to the transmitting antenna to produce the specified field strengths. 6.5 Spectrum analyser The sp
45、ectrum analyser shall be capable of covering the specified frequency bands. The spectrum analyser is used in conjunction with the receiving antenna during the chamber characterization with and without the DUT. 6.6 Directional coupler The directional coupler shall be capable of covering the specified
46、 frequency bands. It shall be capable of handling the RF output of the power amplifier without damage. The directional coupler is used in conjunction with the power meter to measure the forward power delivered to the transmitting antenna. 6.7 Power meter The power meter shall be capable of covering
47、the specified frequency bands. The power meter is used in conjunction with the directional coupler to measure the forward power delivered to the transmitting antenna. 6.8 Computer control Specialized software used in conjunction with a computer and the RF test equipment should be utilized to charact
48、erize the chamber performance in accordance with Annex B, prior to any DUT testing. The software should store the characterization information for use during testing. The computer and software will then be used to control the RF test equipment and tuner during DUT testing. The software shall be capa
49、ble of performing the tests as described in Clause 8. 6.9 Stimulation and monitoring of the DUT The DUT shall be operated as required in the test plan by actuators which have a minimum effect on the electromagnetic characteristics, e.g. plastic blocks on the push-buttons, pneumatic actuators with plastic tubes. Connections to equipment monitoring electromagnetic interference reactions of the DUT may be accomplished by using fibre-optics, or high resistance leads. Other type of leads ma
