1、BS ISO24637:2009ICS 49.140NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDSpace systems Electromagneticinterference (EMI)test reportingrequirementsThis British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee on 30 April2009
2、BSI 2009ISBN 978 0 580 56584 7Amendments/corrigenda issued since publicationDate CommentsBS ISO 24637:2009National forewordThis British Standard is the UK implementation of ISO 24637:2009.The UK participation in its preparation was entrusted to TechnicalCommittee ACE/68/-/1, Space systems and operat
3、ions - EngineeringDesign production.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application.Compliance with a British Sta
4、ndard cannot confer immunityfrom legal obligations.BS ISO 24637:2009Reference numberISO 24637:2009(E)ISO 2009INTERNATIONAL STANDARD ISO24637First edition2009-02-15Space systems Electromagnetic interference (EMI) test reporting requirements Systmes spatiaux Exigences pour lenregistrement de lessai di
5、nterfrences lectromagntiques (EMI) BS ISO 24637:2009ISO 24637:2009(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and instal
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8、ease inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2009 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
9、, without permission in writing 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 2009 A
10、ll rights reservedBS ISO 24637:2009ISO 24637:2009(E) ISO 2009 All rights reserved iiiForeword ISO (the 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 thr
11、ough ISO technical committees. Each member body interested in a subject for which a technical committee 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 collabo
12、rates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical 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 Stand
13、ards. Draft International Standards adopted by the technical committees are circulated to the member 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
14、this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 24637 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 14, Space systems and operations. BS ISO 24637:2009ISO 24637:2009(
15、E) iv ISO 2009 All rights reservedIntroduction Throughout this International Standard, the minimum essential criteria are identified by the use of the key word “shall”. Recommended criteria are identified by the use of the key word “should”, and while not mandatory, are considered to be of primary i
16、mportance in providing serviceable, economical and practical designs. Deviations from the recommended criteria are only permissible after careful consideration, extensive testing and thorough service evaluation have shown alternative methods to be satisfactory. BS ISO 24637:2009INTERNATIONAL STANDAR
17、D ISO 24637:2009(E) ISO 2009 All rights reserved 1Space systems Electromagnetic interference (EMI) test reporting requirements 1 Scope This International Standard provides specific requirements for the content of equipment-level electromagnetic interference (EMI) test report documentation to ensure
18、that sufficient data is provided for subsequent integration analysis of complex space systems. Emphasis is placed on necessary test report augmentation to include additional test data reporting when specifically needed to document any EMI test limit failures for spaceflight hardware. The requirement
19、s presented in this International Standard apply only to EMI test reports at the equipment level. These requirements are particularly important when an EMI test limit non-conformance waiver is requested for spaceflight equipment in lieu of re-design. 2 Normative references The following referenced d
20、ocuments are indispensable for the application 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 14302, Space systems Electromagnetic compatibility requirements ISO 158
21、64, Space systems General test methods for space craft, subsystems and units ISO/IEC 17025:2005, General requirements for the competence of testing and calibration laboratories 3 Terms, definitions and abbreviated terms 3.1 Terms and definitions For the purposes of this document, the following terms
22、 and definitions apply. 3.1.1 degradation criteria minimum performance criteria required for acceptance of the product as specified in the electromagnetic interference test plan 3.1.2 hard upset degradation of product performance that requires manual (non-automatic) issuance of a reset command or in
23、tervening procedure to restore product nominal performance without removal from the system 3.1.3 onset of susceptibility degradation in product performance of at least one functional characteristic beyond equipment under test parameter tolerance BS ISO 24637:2009ISO 24637:2009(E) 2 ISO 2009 All righ
24、ts reserved3.1.4 product specification equipment under test functional minimum performance requirements with associated accuracy parameters 3.1.5 soft upset degradation in product performance where that product returns to normal with no operator intervention immediately following the removal of the
25、immunity test stimulus 3.2 Abbreviated terms EMI electromagnetic interference EMC electromagnetic compatibility EUT equipment under test IF intermediate frequency LISN line impedance stabilization network NE network equivalent 4 Equipment-level EMI test reporting requirements 4.1 General reporting r
26、equirements 4.1.1 General The general content of the EMI test report shall be in accordance with ISO/IEC 17025:2005, 5.10. System-level electromagnetic compatibility (EMC) test reporting shall comply with ISO 15864 and ISO 14302. 4.1.2 Description of the test article The test article shall be identi
27、fied by model and serial number. A short functional description of the EUT shall be provided to enable the EMC systems analyst to understand the criticality of function, operating modes and, if known, the significance of interfaces with other equipment in the complete operating system. This requirem
28、ent may be met with an associated reference which includes the equipments functional design description, containing an explanation of nominal signal parameters such as data rate, clock speed, frequency list, IF with bandwidths, and voltage input and output characteristics. A complete description of
29、the test setup shall be supplied in the form of photos and individual wiring harness schematics, including shielding, twisting and grounding/isolation with respect to structure for primary power, secondary power and signal wiring including that of external test loads. It is expected that the EUT wil
30、l be tested using cabling and connectors either pre-defined by the test method or that agreed to by the customer, i.e. flight harness configuration. Any deviation from either standard test method wiring configuration or flight harness configuration shall be noted in the test report. Setup, operation
31、, and control settings of any video display that is part of the EUT shall be described. 4.1.3 Supporting documentation The standard(s) to which the EUT was tested shall be clearly described in the test report. The EMI test report shall reference other supporting documentation containing the function
32、al description and interface wiring, the EMI test plan, EMI test specifications, techniques, “as run” procedures and the daily test log. BS ISO 24637:2009ISO 24637:2009(E) ISO 2009 All rights reserved 34.1.4 Signature information The EMI test report shall contain the names of the EUT product enginee
33、r and the EMI test engineer, including sufficient information so that they may be contacted by telephone or e-mail. The location of the test site shall be identified in the test report. 4.1.5 Summary conclusions The EMI test report shall contain a summary conclusion narrative, stating either complet
34、e compliance with each of the EMI test requirements, or describing any non-conformance with the test limits or approved test procedure, in such cases giving a list of non-conformance reports issued throughout the test. 4.1.6 Modifications to the EUT A description shall be provided to explain any mod
35、ification to the EUT during the course of performing the test plan. It shall be made clear in the test report which corrective actions (modification of the EUT during the test) will become part of the flight article, with those test results clearly marked as such. 4.1.7 Procedure variation A descrip
36、tion shall be provided to explain any modification to the test procedure during the course of performing the test plan. Procedure variations shall be made clear in the test report to differentiate between multiple test results, and clearly marked as such. 4.2 Specific reporting requirements 4.2.1 Ge
37、neral The test report shall contain: a) all the information necessary to reproduce the test; b) the EUT operating modes in which the emission and susceptibility tests have been performed. 4.2.2 EMI measurement system information The following EMI measurement system detail shall be included in the EM
38、I test report: a) test equipment used, software support programme, and calibration certification; b) photograph and drawings of each unique test setup, including EUT and interfacing cabling; c) antenna factors and frequency ranges of magnetic and electric field antennas; d) antenna distance from EUT
39、; e) transfer impedance of current probes and/or termination impedances provided by LISNs; f) LISN (NE) transfer function as a function of frequency; g) description of software operations/calculations used to produce measurement output (scan averaging or peak-hold, antenna factors, cable loss, atten
40、uators, and amplifiers): this description shall include the means used to verify each test methods end-to-end accuracy; if data quality has been compromised due to test conditions, the reason and impact on results shall be stated; h) measurement system scan speeds, step sizes, and measurement bandwi
41、dths as a function of frequency; BS ISO 24637:2009ISO 24637:2009(E) 4 ISO 2009 All rights reservedi) antenna polarizations used; j) EUT power source frequency, voltage, nominal operating current, and facility temperature and relative humidity; k) compression level of active devices (amplifiers) in m
42、easurement chain; l) facility limitations from that requested or required by the test plan and procedures; m) method of radiated susceptibility field determination and modulation type; n) grounding configuration of EUT and test support equipment. 4.2.3 EMI measurement reporting resolution EMI test d
43、ata shall be reported in graphic form with frequency resolution of 1 %, and decibel notation within 1 dB. For test limit failure conditions, improved data resolution shall be provided as further explained in 4.3. 4.3 Reporting emissions test results 4.3.1 General Data output of the EUT test result s
44、hall be in the form of amplitude over time (for the time domain plots) and amplitude over frequency (for frequency domain plots), superimposed with the EMI test limit. Conducted and radiated interference background plots shall be included for each test configuration unless all emission data are 6 dB
45、 below the limit. Test data shall include X and Y legend, date and time recorded and the respective EUT operational mode. 4.3.2 Conducted interference test results 4.3.2.1 General Each conducted interference test measurement result shall be clear in its intent to measure common-mode or differential-
46、mode current or voltage. 4.3.2.2 Power bus conducted interference, load induced, frequency domain Data presentation shall be a graphic output of amplitude versus frequency. Units of measurement for frequency domain conducted emissions measurements shall be reported in units of dB referenced to one m
47、icrovolt (dBuV), or referenced to one microampere (dBuA), depending on which transducer is specified by the test method and its associated limit. 4.3.2.3 Power bus conducted interference, load induced, time domain ripple Data presentation shall be a graphic output of amplitude versus time, at a time
48、 base that best displays the voltage ripple frequency. Oscilloscope plots shall include the amplitude physical unit (V or A) conversion factors V into A, if applicable, and the oscilloscope sensitivity, time base settings and measurement bandwidth. Amplitude resolution shall be within 3 % and time b
49、ase within 5 %. 4.3.2.4 Power bus load induced switching transients Data presentation shall be a graphic display of voltage amplitude versus time, or current versus time for in-rush at a time base that best displays the transient characteristic with respect to the applicable limit. Amplitude resolution shall be within 3 % and time base within 5 %. BS ISO 24637:2009ISO 24637:2009(E) ISO 2009 All rights reserved 54.3.2.5 Antenna connection port spurious emissions 4.3.2.5.1 Receivers and transmitters (in standby mode) Data presentation
