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GB 9254-2008 (GB9254-2008)

Chinese standards (related to): 'GB 9254-2008'
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)See DetailStatusGoogle Book
GB/T 9254.1-2021English1235 Add to Cart 0-9 seconds. Auto delivery. Information technology equipment, multimedia equipment and receivers -- Electromagnetic compatibility -- Part 1: Emission requirements GB/T 9254.1-2021 Valid GBT 9254.1-2021
GB 9254-2008English370 Add to Cart 0-9 seconds. Auto delivery. [GB/T 9254-2008, 2013-XG1 included] Information technology equipment - Radio disturbance characteristics - Limits and methods of measurement GB 9254-2008 Obsolete GB 9254-2008
GB 9254-1998English455 Add to Cart 0-9 seconds. Auto delivery. Information technology equipment--Radio disturbance characteristics--Limits and methods of measurement GB 9254-1998 Obsolete GB 9254-1998
GB 9254-1988EnglishRFQ ASK 3 days Limits and methods of measurement of radio interference characterisics of information technology equipment GB 9254-1988 Obsolete GB 9254-1988

Standard ID GB 9254-2008 (GB9254-2008)
Description (Translated English) [GB/T 9254-2008, 2013-XG1 included] Information technology equipment - Radio disturbance characteristics - Limits and methods of measurement
Sector / Industry National Standard
Classification of Chinese Standard L06
Classification of International Standard 33.100
Word Count Estimation 60,699
Date of Issue 2008-08-06
Date of Implementation 2009-09-01
Older Standard (superseded by this standard) GB 9254-1998
Quoted Standard GB 1002-1996; GB/T 17626.6-2008; GB 4824-2004; GB 13837-2003; GB/T 6113.101-2008; GB/T 6113.102-2008; GB/T 6113.104-2008; GB/T 6113.203-2008; GB/T 6113.402-2006; IEC CISPR 16-1-1-2003; IEC CISPR 16-1-4-2007
Adopted Standard CISPR 22-2006, IDT
Drafting Organization Ministry of Information Industry Electronic Industry Standardization Institute
Administrative Organization National Standardization Technical Committee radio interference
Regulation (derived from) Announcement of Newly Approved National Standards No. 14 of 2008 (total 127)
Proposing organization Radio Interference National Standardization Technical Committee (SAC/TC 79)
Issuing agency(ies) Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China
Summary This Chinese standard applies to the definition of information technology equipment (ITE). This standard specifies the measurement of electromagnetic disturbance generated by ITE level procedures requiring Class A and Class B equipment disturbance limits apply to 9kHz ~ 400GHz. The band has not yet specified limits, do not measure. This standard is intended to apply within the scope of equipment given radio disturbance level uniform requirements, provides disturbance limits, methods of measurement, operating conditions and results of treatment.

GB 9254-2008: PDF in English
GB 9254-2008
Information technology equipment - Radio disturbance characteristics - Limits and methods of measurement
ICS 33.100
National Standards of People's Republic of China
Replacing GB 9254-1998
IT equipment
Limits and methods of measurement of radio harassment
(CISPR22.2006, IDT)
Published 2008-08-06
2009-09-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China issued
Table of Contents
Introduction Ⅲ
Introduction Ⅴ
1 Scope 1
2 Normative References 1
3 Definitions 1
4 ITE classification 3
Class 4.1 B ITE 3
4.2 A Class ITE 3
5 conductive power supply terminal and the telecommunication port 3 of disturbance limits
5.1 Power terminal disturbance voltage limit 4
5.2 conducting the telecommunication port common mode disturbance limits 4
6 disturbance limits radiation 4
6.1 1GHz below the limit of 4
More than 6.2 1GHz limit of 5
7 Description of CISPR disturbance limits of 5
Meaning 7.1 CISPR limit of 5
7.2 Application of limits in mass production compliance test 6
6 8 general measurement conditions
8.1 Environmental level 6
General Requirements 6 8.2 pairs arranged EUT
8.3 EUT arrangement 8
8.4 EUT operating state 9
Measurement conducted disturbances and the power supply terminal 109 of the telecommunication port
9.1 Measurement detector 10
9.2 Measurement Receiver 10
9.3 Artificial mains network (AMN) 11
Reference ground plane 11 9.4
9.5 EUT arrangement 11
12 telecommunications measuring 9.6 port harassment
9.7 Measurement Record 14
10 14 radiated disturbance measurements
Measurement detector 14 10.1
10.2 1GHz following measurement receiver 15
10.3 1GHz below the antenna 15
10.4 1GHz following measurement site 15
10.5 1GHz following arrangement of 16 EUT
10.6 1GHz or more measuring radiation emission 16
10.7 Measurement Record 16
Measurement environment of strong signal is present 16 10.8
10.9 measuring the user's site 17
11 17 Measurement Uncertainty
Annex A (normative) alternative test site 25 site attenuation measurements
Annex B (normative) for measuring the peak detector 30 of the Decision Tree
Annex C (normative) common mode measurements may be disposed Test Method and Test 31
Annex D (informative) the impedance stabilization network (ISN) of a circuit example schematic diagram 36
Annex E (informative) signal parameters of the telecommunication port 45
Principles and methods (informative) telecommunication port disturbance measurements Appendix F 47
Some ITE work status of Annex G (informative) 52
Reference 53
All technical contents of this standard is mandatory.
Equivalent standards adopted CISPR22.2006 (Version 5.2) "Limits and methods of measurement harassment radio information technology equipment."
This standard CISPR22.2006 standard some editorial errors or wrong to do the following changes.
--- deleted CISPR22. 7 "Abbreviations used in the figure" 2006 (version 5.2) in the table, the original Tables 8 and 9 became the standard
Quasi Table 7 and 8;
In --- 7.2.3 adds dB (μA) units;
8.1 --- second stage, the original 10.5 to 10.8 standard;
8.4 --- last sentence, the original 8.4.1 Appendix to this standard G.1;
--- FIG. 8, FIG. 9 shows a "typical distance" arrow spaced locations has been adjusted;
--- 9.5.1 The last sentence "In case of dispute, the test should be the original tests." Move 9.5.2 "test report" section
After the fall;
--- 10.4.5, delete the original note "AnnexAwilbereplacedbythecorrespondingprocedurewhen
specifiedinCISPR16-1 ".;
--- Table A.1, 600MHz sixth data corresponding to the original "00" to this standard "0.0";
--- FIG A.2b FIG title, the original "vertical polarization" according to standard "horizontal polarization";
FIG C.1 ~ --- FIG C.4, the position of the arrow represent some distance has been adjusted;
C.2 --- line 3, to the description of FIG C.4 C.5 FIG present standard;
--- Figure C.6, the leftmost penultimate block diagram, delete the original "-For" poorly "balancedcable, useISNas
definedin9.6.2c) 4) ";
FIG D.1 ~ --- NOTE D.7 FIG 2, the original text ". 9.6.2c) 1) -4)" to "9.6.2c) 1) -3).";
--- In F.3, the original note in the last sentence "Forlongcableswhereboththevoltageandcurrentlimits
cannotbemet, itisrecommendedtousethepowermeasurementapproachofC.1.5 "deleted.;
--- FIG F.3, the original "Veuctcm" "Zeuctcm" to this standard "Veutcm", "Zeutcm";
Instead of the standard GB 9254-1998 "Limits and methods of measurement of radio disturbance information technology equipment."
Compared with this standard GB 9254-1998, there are major changes.
--- referenced standard version change (see Chapter 2);
--- deleted GB 9254-1998 Table 4 Note 3;
--- increased radiation emission limits 1GHz ~ 6GHz (see 6.2);
--- For the floor device, which distance is changed from the reference ground plane is no greater than 0.15M 0.012m (see 8.3.2);
--- increased work requirements multifunction device state (see 8.4.1);
--- power supply terminal conduction emission test, may be used in addition to continuing 50Ω/50μH artificial network, but also allows the use of
50Ω/50μH 5Ω artificial network (see 9.3);
--- pair (LCL) longitudinal conversion loss parameter values used in the telecommunication test port impedance stabilization network (ISN) has been modified, increased
LCL parameter values for the six types of cable (see 9.6.2)
--- increased (measuring instrument, antenna, space and measurement methods) for the related content 1GHz ~ 6GHz emitted radiation detected
(See 10.6);
--- in the test report, requested uncertainty of measuring instruments and their associated connections (see 10.7 and Chapter 11);
--- conducting emission radiation emitted by the test arrangement has been modified (see FIG. 4 to FIG. 13, etc.);
--- telecommunications increased detection method flowchart (see FIG C.6) port;
--- added some impedance stabilization network diagram (see Appendix D);
--- Added Appendix F;
--- The 1998 version 8.2.1 - 8.2.3 to the new increase in Appendix G. In addition, also provided by the operating state 1998 Edition
The requirements of the wording was changed to the current wording of the recommendation.
This standard Appendix A, Appendix B, Appendix C is a normative, Appendix D, Appendix E, Appendix F., Appendix G is an information appendix.
This standard was proposed by the National Standardization Technical Committee on Radio Interference (SAC/TC79).
This standard by the National Standardization Technical Committee on Radio Interference.
This standard is mainly drafted by. Ministry of Information Industry Institute of Electronics Standardization, Lenovo Group, Huawei Technologies Co., Ltd.
The main drafters. Shi-steel, Chen Li, Lv Feiyan, Zhang Xinghai, Zhang Peng.
This section replaces the following previously issued as follows.
--- GB 9254-1988, GB 9254-1998.
This standard 6.2,9.6.2.c) 1), 10.6 deferred embodiment, i.e., started from the present 18 months after the date of the standard. Figure C.6
"Standard Test Method for selecting a flow chart of" the content from the beginning of the downward path of "power line port" "9.3 using a predetermined method using Table 1 →
Table limits "of the indefinite extension 2 embodiment.
The present scope of the standard extended to the entire range of radio frequencies 9kHz ~ 400GHz, but only a limited band in the predetermined limit harassment
Value, which limit value is considered to not only protect the radio and telecommunication services, and other devices may be allowed at a predetermined distance required by the reasonable
IT equipment
Limits and methods of measurement of radio harassment
1 Scope
This standard applies to 3.1 defined by information technology equipment (ITE).
This standard specifies the level measuring electromagnetic disturbance generated ITE procedure, a predetermined class A and class B limit of disturbance applied to the device
9kHz ~ 400GHz. For yet specified limits of the band, do not measure.
This standard is designed to give uniform requirements for a radio disturbance level of the device within the scope of application, the predetermined limit of disturbance, measurement methods,
Operating conditions and results of treatment.
2 Normative references
Terms of the following documents become provisions of this standard by reference in this standard. For dated reference documents, all later
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to agreements based on this standard
Whether the latest versions of these documents. For undated references, the latest version applies to this standard.
GB 1002-1996 household and similar purposes plugs and sockets single phase type, basic parameters and dimensions
GB/T 17626.6-2008 Electromagnetic compatibility testing and measurement techniques conducted disturbances induced by radiofrequency fields Immunity (IEC 61000-
4-6.2006, IDT)
GB 4824-2004 industrial, scientific and medical disturbance characteristics (ISM) radio equipment limits and measure......