This standard specifies the limits and measurement methods of the immunity characteristics of sound and television receivers and related equipment to radio disturbances, as well as the statistical methods for compliance with the limits. This standard is applicable to the measurement of the immunity of sound and television broadcast receivers and related equipment to environmental electromagnetic induced currents and induced voltages, with a frequency range of 150kHz to 1GHz. This standard is also applicable to the immunity of direct-to-home (DTH) outdoor units of satellite receiving systems for individual reception. GB/T 9383-1999 Immunity limits and measurement methods for sound and television broadcast receivers and related equipment GB/T9383-1999 Standard download decompression password: www.bzxz.net

GB/T9383—1999
This standard is equivalent to the International Electrotechnical Commission IEC/CISPR20:1998 "Sound and television broadcast receivers and related equipment immunity characteristics limits and measurement methods".
This standard is a supplementary revision of GB/T13838--1992 "Sound and television broadcast receivers and related equipment radiated immunity characteristics allowable values ​​and measurement methods", GB/T13839--1992 "Sound and television broadcast receivers and related equipment internal immunity characteristics allowable values ​​and measurement methods" and GB9383-1995 "Sound and television broadcast receivers and related equipment conducted immunity characteristics limits and measurement methods". This standard has comprehensively revised the contents of the above three standards, especially the technical contents such as the limits and measurement methods of internal immunity and shielding effect have been greatly revised, and the immunity requirements for satellite receivers have been added. This standard is not only the technical standard basis for the production and sales of products organized by relevant enterprises, but also the technical standard basis for relevant trade and engineering fields.
This standard replaces GB9383-1995GB/T13838--1992 and GB/T13839-1992 from the date of implementation. Appendix B of this standard is the appendix of the standard, and Appendix A and Appendix C are both suggested appendixes. This standard is proposed by the National Technical Committee for the Promotion of Radio Interference Standards. This standard is under the jurisdiction of the National Technical Committee for the Standardization of Radio Interference. The drafting units of this standard are: the Third Research Institute of the Ministry of Electronics Industry, Qingdao Hisense Electric Group. The main drafting persons in charge of this standard are: Lin Jingping, Li Shunyang, Chen Wei, Qiu Aihong, Jin Jian, etc. Adoption instructions:
CISPR20 also includes Appendix D, which is about G-type unwanted signal generator. Due to the format, it is deleted in this standard. GB/T 9383--1999
IEC/CISPR Foreword
1) CISPR's formal decisions or agreements on technical issues are made by all CISPR National Committees and other member organizations that have paid special attention to the issue in the subcommittee. It expresses the international consensus on the issues involved as far as possible. 2) These decisions or agreements are made available for international use in the form of recommendations and are accepted by CISPR National Committees and other member organizations in this sense.
3) In order to promote international consensus, CISPR hopes that the text of this CISPR recommendation document will be used in national regulations as soon as possible under the conditions. Any differences between CISPR recommendations and corresponding national regulations should be clearly stated in the national regulations as far as possible.
This publication was prepared by the CISPR/E Subcommittee "Interference Characteristics of Radio Receivers". This fourth edition replaces the third edition of 1996 and its first amendment (1997) and second amendment (1997) and constitutes a technical version. bzxz.net
The text of this CISPR publication is based on the documents in the table below:FDIS
CISPR/E/174/FDIS
Voting Report
CISPR/E/178/RVD
All information on the voting for this publication can be found in the voting report shown in the table above. This standard will also be revised in the future based on experience accumulated in use. Annexes B and D are considered an integral part of this standard. Annexes A and C are for reference only.
1 Scope
National Standard of the People's Republic of China
Limits and methods of measurement of immunitycharacteristics of sound and television broadcastreceivers and associated equipmentGB/T 9383 -1999
eqv IEC/CISPR 20:1998
Replaces GB9383--1995
GB/T 13838-1992
GB/T13839-1992
This standard specifies the limits and methods of measurement of immunitycharacteristics of sound and television broadcastreceivers and associated equipment to radio disturbances, as well as the statistical methods for compliance with the limits.
This standard applies to the measurement of the immunity of sound and television broadcast receivers and related equipment to environmental electromagnetic fields, induced currents and induced voltages in the frequency range of 150 kHz to 1 GHz. This standard also applies to the immunity of direct-to-the-home (DTH) outdoor units of satellite reception systems for individual reception. Note: The requirements for satellite reception systems for collective reception, especially the front end of cable distribution systems (community antenna television CATV) and common reception systems (master antenna television, MATV) are included in IEC 60728-2. 2 Reference standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. At the time of publication of this standard, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB3174--1995 Technical Specification for PAL-D Television Broadcasting GB/T4365--1995 Electromagnetic Compatibility Terminology (idtIEC50(161):1990) GB/T6113.1-1995 Specification for Radio Interference and Immunity Measurement Equipment (eqV CISPR16-1:1993) GB/T6163-1985 Measurement Methods for FM Broadcasting Receivers (neg IEC315-4:1982) GB/T7401--1987 Subjective Evaluation Method for Color Television Image Quality GB/T9023--1988 Measurement Method for Shielding Effectiveness of Radio Frequency Coaxial Cable (Transfer Impedance Method) (eqv IEC96-1:1986) GB13837--1997 Limits and Measurement Methods for Radio Interference Characteristics of Sound and Television Broadcast Receivers and Related Equipment (eqv IEC/CISPR 13:1996)
GB/T17309.1--1998 Measurement methods for television broadcast receivers Part 1 General considerations for measurement of RF and video electrical properties and measurement of display performance (idtIEC107-1:1995) SJ/Z9118.2-~1987 Tape recording and playback systems Part 2 Calibration tapes SJ/Z9124.1~9124.3-1987 Records and phonograph players SJ/T10344—1993 12.65mm VHS video base tapes IEC60728-2:1997 Television and sound signal cable distribution systems Part 2: Electromagnetic compatibility of equipment
3 Definitions
In addition to the definitions in GB/T4365 and GB13837., this standard adopts the following definitions. Approved by the State Administration of Quality and Technical Supervision on August 2, 1999 and implemented on March 1, 2000
3.1 External immunity
external immunity
GB/T 9383—1999
When electromagnetic disturbance enters the receiver or related equipment through a path other than the antenna input terminal, the receiver or related equipment can operate normally without performance degradation.
3.2 Internal immunityinternal immunityWhen electromagnetic disturbance enters the receiver or related equipment through the antenna input terminal, the receiver or related equipment can operate normally without performance degradation. The immunity of the receiver or related equipment is expressed in terms of the level of the interference signal, which refers to the level of interference signal under specified conditions. The image or sound of the equipment under test produces a specified performance degradation. 3.3 Shielding effectiveness!] The coaxial connection terminal of the receiver or related equipment attenuates the characteristic of converting its external current into internal voltage. 3.4 Sound receiversSound receiversEquipment used to receive sound broadcasting and similar services transmitted by terrestrial, cable and satellite. 3.5 Television receivers Television receivers Equipment for receiving television broadcasts and similar services transmitted by terrestrial, cable and satellite. NOTE
Component units that implement part of the functions of a sound or television reception system (e.g. tuners, frequency converters, amplifiers, equalizers, monitors, etc.) can be considered as sound or television receivers, respectively.
2 Tuners may have satellite broadcast receivers and have demodulators, decoders, signal separators, D/A converters, encoders (e.g. NTSC, PAI or SECAM encoders), etc.
3 Frequency converters may have satellite broadcast reception sections and have means to convert the signal to another frequency band. 4 Receivers, tuners or frequency converters may be tuned or can only receive a fixed frequency. 3.6 Associated equipment Equipment directly connected to sound and television receivers, or independent equipment capable of producing or reproducing audio or video. Note: In fact, this standard stipulates that the performance degradation of images refers to the presentation of just noticeable interference, and the performance degradation of sounds refers to the ratio of the audio test signal output level to the audio interference signal output level. Therefore, in order for the device under test to work properly, it is necessary to feed the device under test with a standard input signal. External immunity can be divided into:
immunity to environmental fields;
immunity to induced currents;
immunity to induced voltages.
4 Immunity limits
When measured using the method specified in Chapter 5, the measurement results should not be greater than the limits specified in 4.1 to 4.3. At the overlapping frequency points of the two frequency ranges, the more stringent limits should be used. For mass-produced equipment, an 80% confidence level and at least 80% of the products meet the limit requirements are required.
4.1 External immunity
4.1.10. The immunity measurement to environmental electromagnetic fields in the frequency range of 15MHz to 150MHz shall be carried out in accordance with 5.2. The limits are shown in Tables 1 to 4. Table 1 Immunity limits to environmental electromagnetic fields for audio functions of sound and television receivers Frequency, MHz
Instructions for use:
Level, dB(μV/m)
1ICISPR20 does not give a definition of shielding effectiveness (under consideration), and this definition is given based on EN55020. 4
GB/T 9383 --- 1999
Table 2 Limits of immunity of sound receiver to environmental electromagnetic fields for FM band receiving function Frequency MHz
0. 15~150
Except frequency band:
(--- 0. 5)~(ff+0. 5)
(f, 0. 5)~(f.+0. 5)
(fim0. 5)~(fim+0. 5)
87~108
Level, dB(μV/m)
Under consideration
Note: is the intermediate frequency (f=10.7MHz); f is the tuning frequency, f --f.±f, is the local oscillator frequency; fi is f±2f, is the pseudo frequency, here: when f. >f,fim=f+2f, when f
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