GB/T 17626.3-2016 Electromagnetic compatibility- Testing and measurement techniques- Radiated，radio-frequency，electromagnetic field immunity test (English Version)
Electromagnetic Compatibility — Testing And Measurement Techniques — Radiated, Radio-frequency, Electromagnetic Field Immunity Test
1 Scope
This part of GB/T 17626 is applicable to the immunity requirements of electrical and electronic equipment to radiated electromagnetic energy. It establishes test levels and the required test procedures.
The object of this part is to establish a common reference for evaluating the immunity of electrical and electronic equipment when subjected to radiated, radio-frequency electromagnetic fields. The test method documented in this part describes a consistent method to assess the immunity of an equipment or system against a defined phenomenon.
Note 1: As described in GB/Z 18509, this is a basic EMC publication for use by product committees. As also stated in GB/Z 18509, the product committees are responsible for determining whether this immunity test standard should be applied or not, and if applied, they are responsible for determining the appropriate test levels and performance criteria. National Technical Committee on Electromagnetic Compatibility of Standardization Administration of China (SAC/TC 246) and its sub-committees are prepared to co-operate with product committees in the evaluation of the value of particular immunity tests for their products.
This part deals with immunity tests related to the protection against RF electromagnetic fields from any source.
Particular considerations are devoted to the protection against radio-frequency emissions from digital radiotelephones and other RF emitting devices.
Note 2: Test methods are defined in this part for evaluating the effect that electromagnetic radiation has on the equipment concerned. The simulation and measurement of electromagnetic radiation is not adequately exact for quantitative determination of effects. The test methods defined are structured for the primary objective of establishing adequate repeatability of results at various test facilities for qualitative analysis of effects.
This part is an independent test method. Other test methods may not be used as substitutes for claiming compliance with this part.
2 Normative References
The following referenced documents 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.
IEC 60050(161) International Electrotechnical Vocabulary (IEV) — Chapter 161: Electromagnetic Compatibility
IEC 61000-4-6 Electromagnetic Compatibility (EMC) — Part 4-6: Testing And Measurement Techniques — Immunity To Conducted Disturbances, Induced By Radio-frequency Fields
3 Terms and Definitions
For the purposes of this document, the following terms and definitions apply.
3.1
amplitude modulation
process by which the amplitude of a carrier wave is varied following a specified law
3.2
anechoic chamber
shielded enclosure which is lined with radio-frequency absorbers to reduce reflections from the internal surfaces
3.2.1
fully anechoic chamber
shielded enclosure whose internal surfaces are totally lined with anechoic material
3.2.2
semi-anechoic chamber
shielded enclosure where all internal surfaces are covered with anechoic material with the exception of the floor, which shall be reflective (ground plane)
3.2.3
modified semi-anechoic chamber
semi-anechoic chamber which has additional absorbers installed on the ground plane
3.3
antenna
transducer which either emits radio-frequency power into space from a signal source or intercepts an arriving electromagnetic field, converting it into an electrical signal
3.4
balun
device for transforming an unbalanced voltage to a balanced voltage or vice versa
[IEV 60050(161)]
3.5
continuous waves (CW)
electromagnetic waves, the successive oscillations of which are identical under steady-state conditions, which can be interrupted or modulated to convey information
3.6
electromagnetic (EM) wave
radiant energy produced by the oscillation of an electric charge characterized by oscillation of the electric and magnetic fields
3.7
far field
region where the power flux density from an antenna approximately obeys an inverse square law of the distance.
For a dipole this corresponds to distances greater than λ/2π, where λ is the wavelength of the radiation
3.8
field strength
Field strength (namely electric field strength) is the ratio of the electrostatic force to the electric charge at a point in the electric field, which is used to indicate the strength and direction of the electric field.
The term "field strength" is applied only to measurements made in the far field. The measurement may be of either the electric or the magnetic component of the field and may be expressed as V/m, A/m or W/m2; any one of these may be converted into the others.
For measurements made in the near field, the term "electric field strength" or "magnetic field strength" is used according to whether the resultant electric or magnetic field, respectively, is measured. In this field region, the relationship between the electric and magnetic field strength and distance is complex and difficult to predict, being dependent on the specific configuration involved. Inasmuch as it is not generally feasible to determine the time and space phase relationship of the various components of the complex field, the power flux density of the field is similarly indeterminate.
3.9
frequency band
continuous range of frequencies extending between two limits
3.10
Ec
field strength applied for calibration
3.11
Et
carrier field strength applied for testing
3.12
full illumination
Foreword II
1 Scope
2 Normative References
3 Terms and Definitions
4 General
5 Test Levels
5.1 Test Levels Related to General Purposes
5.2 Test Levels Related to the Protection Against RF Emissions from Digital Radio Telephones and Other RF Emitting Devices
6 Test Equipment
6.1 Description of the Test Facility
6.2 Calibration of Field
7 Test Setup
7.1 Arrangement of Table-top Equipment
7.2 Arrangement of Floor-standing Equipment
7.3 Arrangement of Wiring
7.4 Arrangement of Human Body-mounted Equipment
8 Test Procedure
8.1 Laboratory Reference Conditions
8.2 Execution of the Test
9 Evaluation of Test Results
10 Test Report
Annex A (Informative) Rationale for the Choice of Modulation for Tests Related to the Protection against RF Emissions from Digital Radio Telephones
Annex B (Informative) Field Generating Antennas
Annex C (Informative) Use of Anechoic Chambers
Annex D (Informative) Amplifier Non-linearity and Example for the Calibration Procedure According to
Annex E (Informative) Guidance for Product Committees on the Selection of Test Levels
Annex F (Informative) Selection of Test Methods
Annex G (Informative) Description of the Environment
Annex H (Normative) Alternative Illumination Method for Frequencies Above 1 GHz (“Independent Windows Method”)
Annex I (Informative) Calibration Method for E-field Probes
Annex J (Informative) Measurement Uncertainty due to Test Instrumentation
GB/T 17626.3-2016 Electromagnetic compatibility- Testing and measurement techniques- Radiated，radio-frequency，electromagnetic field immunity test (English Version)
Standard No.
GB/T 17626.3-2016
Status
valid
Language
English
File Format
PDF
Word Count
25000 words
Price(USD)
390.0
Implemented on
2017-7-1
Delivery
via email in 1 business day
Detail of GB/T 17626.3-2016
Standard No.
GB/T 17626.3-2016
English Name
Electromagnetic compatibility- Testing and measurement techniques- Radiated，radio-frequency，electromagnetic field immunity test
Electromagnetic Compatibility — Testing And Measurement Techniques — Radiated, Radio-frequency, Electromagnetic Field Immunity Test
1 Scope
This part of GB/T 17626 is applicable to the immunity requirements of electrical and electronic equipment to radiated electromagnetic energy. It establishes test levels and the required test procedures.
The object of this part is to establish a common reference for evaluating the immunity of electrical and electronic equipment when subjected to radiated, radio-frequency electromagnetic fields. The test method documented in this part describes a consistent method to assess the immunity of an equipment or system against a defined phenomenon.
Note 1: As described in GB/Z 18509, this is a basic EMC publication for use by product committees. As also stated in GB/Z 18509, the product committees are responsible for determining whether this immunity test standard should be applied or not, and if applied, they are responsible for determining the appropriate test levels and performance criteria. National Technical Committee on Electromagnetic Compatibility of Standardization Administration of China (SAC/TC 246) and its sub-committees are prepared to co-operate with product committees in the evaluation of the value of particular immunity tests for their products.
This part deals with immunity tests related to the protection against RF electromagnetic fields from any source.
Particular considerations are devoted to the protection against radio-frequency emissions from digital radiotelephones and other RF emitting devices.
Note 2: Test methods are defined in this part for evaluating the effect that electromagnetic radiation has on the equipment concerned. The simulation and measurement of electromagnetic radiation is not adequately exact for quantitative determination of effects. The test methods defined are structured for the primary objective of establishing adequate repeatability of results at various test facilities for qualitative analysis of effects.
This part is an independent test method. Other test methods may not be used as substitutes for claiming compliance with this part.
2 Normative References
The following referenced documents 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.
IEC 60050(161) International Electrotechnical Vocabulary (IEV) — Chapter 161: Electromagnetic Compatibility
IEC 61000-4-6 Electromagnetic Compatibility (EMC) — Part 4-6: Testing And Measurement Techniques — Immunity To Conducted Disturbances, Induced By Radio-frequency Fields
3 Terms and Definitions
For the purposes of this document, the following terms and definitions apply.
3.1
amplitude modulation
process by which the amplitude of a carrier wave is varied following a specified law
3.2
anechoic chamber
shielded enclosure which is lined with radio-frequency absorbers to reduce reflections from the internal surfaces
3.2.1
fully anechoic chamber
shielded enclosure whose internal surfaces are totally lined with anechoic material
3.2.2
semi-anechoic chamber
shielded enclosure where all internal surfaces are covered with anechoic material with the exception of the floor, which shall be reflective (ground plane)
3.2.3
modified semi-anechoic chamber
semi-anechoic chamber which has additional absorbers installed on the ground plane
3.3
antenna
transducer which either emits radio-frequency power into space from a signal source or intercepts an arriving electromagnetic field, converting it into an electrical signal
3.4
balun
device for transforming an unbalanced voltage to a balanced voltage or vice versa
[IEV 60050(161)]
3.5
continuous waves (CW)
electromagnetic waves, the successive oscillations of which are identical under steady-state conditions, which can be interrupted or modulated to convey information
3.6
electromagnetic (EM) wave
radiant energy produced by the oscillation of an electric charge characterized by oscillation of the electric and magnetic fields
3.7
far field
region where the power flux density from an antenna approximately obeys an inverse square law of the distance.
For a dipole this corresponds to distances greater than λ/2π, where λ is the wavelength of the radiation
3.8
field strength
Field strength (namely electric field strength) is the ratio of the electrostatic force to the electric charge at a point in the electric field, which is used to indicate the strength and direction of the electric field.
The term "field strength" is applied only to measurements made in the far field. The measurement may be of either the electric or the magnetic component of the field and may be expressed as V/m, A/m or W/m2; any one of these may be converted into the others.
For measurements made in the near field, the term "electric field strength" or "magnetic field strength" is used according to whether the resultant electric or magnetic field, respectively, is measured. In this field region, the relationship between the electric and magnetic field strength and distance is complex and difficult to predict, being dependent on the specific configuration involved. Inasmuch as it is not generally feasible to determine the time and space phase relationship of the various components of the complex field, the power flux density of the field is similarly indeterminate.
3.9
frequency band
continuous range of frequencies extending between two limits
3.10
Ec
field strength applied for calibration
3.11
Et
carrier field strength applied for testing
3.12
full illumination
Contents of GB/T 17626.3-2016
Foreword II
1 Scope
2 Normative References
3 Terms and Definitions
4 General
5 Test Levels
5.1 Test Levels Related to General Purposes
5.2 Test Levels Related to the Protection Against RF Emissions from Digital Radio Telephones and Other RF Emitting Devices
6 Test Equipment
6.1 Description of the Test Facility
6.2 Calibration of Field
7 Test Setup
7.1 Arrangement of Table-top Equipment
7.2 Arrangement of Floor-standing Equipment
7.3 Arrangement of Wiring
7.4 Arrangement of Human Body-mounted Equipment
8 Test Procedure
8.1 Laboratory Reference Conditions
8.2 Execution of the Test
9 Evaluation of Test Results
10 Test Report
Annex A (Informative) Rationale for the Choice of Modulation for Tests Related to the Protection against RF Emissions from Digital Radio Telephones
Annex B (Informative) Field Generating Antennas
Annex C (Informative) Use of Anechoic Chambers
Annex D (Informative) Amplifier Non-linearity and Example for the Calibration Procedure According to
Annex E (Informative) Guidance for Product Committees on the Selection of Test Levels
Annex F (Informative) Selection of Test Methods
Annex G (Informative) Description of the Environment
Annex H (Normative) Alternative Illumination Method for Frequencies Above 1 GHz (“Independent Windows Method”)
Annex I (Informative) Calibration Method for E-field Probes
Annex J (Informative) Measurement Uncertainty due to Test Instrumentation
