ChinaAutoRegs|GB/T 18655-2025英文版翻译 车辆、船和内燃机 无线电骚扰特性 用于保护车载接收机的限值和测量方法

Vehicles, Boats and Internal Combustion Engines—Radio Disturbance Characteristics—Limits and Methods of Measurement for the Protection of Onboard Receivers

CONTENTS

Foreword I

Introduction IV

1 Scope 1

2 Normative References 1

3 Terms and Definitions 2

4 Requirements Common to Vehicle and Component/Module Emissions Measurement 6

4.1 General Test Requirements 6

4.2 Shielded Enclosure 8

4.3 Absorber-Lined Shielded Enclosure (ALSE) 8

4.4 Measuring Instrument 9

4.5 Power Supply 14

5 Measurement of Emissions Received by the Onboard Antenna 15

5.1 General Requirements 15

5.2 Antenna Measuring System 15

5.3 Method of Measurement 16

5.4 Test Setup for Vehicle in Charging Mode 18

5.5 Examples of Limits for Vehicle Radiated Disturbances 25

6 Measurement of Components and Modules 33

6.1 General Requirements 33

6.2 Test Equipment 33

6.3 Conducted Emissions from Components/Modules – Voltage Method 34

6.4 Conducted Emissions from Components/Modules – Current Probe Method 41

6.5 Conducted Emissions from Components/Modules – ALSE Method 44

6.6 Conducted Emissions from Components/Modules – Stripline Method 59

Annex A (Informative) Flow chart for checking the applicability of this document to vehicles and boats 60

Annex B (Normative) Antenna matching unit – Vehicle test 61

Annex C (Informative) Sheath-current suppressor 63

Annex D (Informative) Guidance for the determination of the noise floor of active vehicle antennas 64

Annex E (Normative) Artificial Network (AN), High Voltage Artificial Network (HV-AN), Direct Current charging Artificial Network (DC-charging-AN), Artificial Mains Network (AMN) and Asymmetric Artificial Network (AAN) 66

Annex F (Informative) Radiated emissions from components/modules – Stripline method 74

Annex G (Informative) Interference to mobile radio communication in the presence of impulsive noise – Methods of judging degradation 82

Annex H (Normative) Test methods for power supply systems for high voltages in electric and hybrid vehicles 85

Annex I (Informative) ALSE performance validation (150 kHz to 1 GHz) 122

Annex J (Informative) Measurement instrumentation uncertainty – Measurement of emissions received by the onboard antenna 135

Annex K (Informative) Uncertainty budgets for measurement of emissions received by the onboard antenna 143

Annex L (Informative) Measurement instrumentation uncertainty – Test methods for emissions from components/modules 151

Annex M (Informative) Uncertainty budgets for measurement of emissions from components/modules 162

Bibliography

1 SCOPE

This document specifies the limits and test methods for radio disturbances in the frequency range of 150 kHz to 5 925 MHz. This document applies to any vehicles, boats, trailers, internal combustion engines (ICE)-driven devices and any electronic/electrical components intended for use in vehicles, boats, trailers and ICE-driven devices. The details of frequency allocations in this document refer to the International Telecommunications Union (ITU) publications and the practical applications in China. The limits specified in this document are intended to provide protection for onboard receivers from disturbances produced by components/modules in the same vehicle.

The receiver types to be protected include broadcast receivers (sound and television), land mobile radio, radio telephone, amateur, citizens’ radio equipment, satellite navigation systems (GPS etc.), Wi- Fi, V2X, and Bluetooth devices. This document does not include the information about protection of electronic control systems from radio frequency (RF) emissions or from transient or impulse voltage fluctuations. This information is included in the publications of other standardization committees.

The limits in this document are recommended and subject to modification as agreed between the vehicle manufacturer and the component supplier. This document is also intended to be applied by vehicle manufacturers and component/equipment suppliers which are to be added and connected to the vehicle harness or to an onboard power connector after delivery of the vehicle.

This document defines test methods for use by vehicle manufacturers and suppliers, to assist in improving the design of vehicles and components and ensure controlled levels of onboard radio frequency emissions.

The radiation requirements in this document are not applicable to the intentional transmissions from a radio transmitter as defined by the ITU, including their spurious emissions.

Note 1: This exclusion is limited to those intended transmitter emissions, which leave the EUT as radiated emissions and are coupled onto the wire line in the test setup. For conducted transmissions on frequencies intentionally produced by the radio part of an EUT, this exclusion does not apply.

Note 2: It is usual for customers and suppliers to use radio regulation standards to manage the spurious emissions from a RF transmitter unless limits of spurious emission are agreed in the test plan.

Note 3: See Annex A for the flow chart for checking the applicability of this document.

2 NORMATIVE REFERENCES

The following normative documents contain provisions which, through normative reference in this text, constitute essential provision of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendment) applies.

GB 1002 Single phase plugs and socket-outlets for household and similar purposes—Types, basic parameters and dimensions

GB/T 2099.1 Plugs and socket-outlets for household and similar purposes—Part 1: General requirements (GB/T 2099.1-2021, IEC 60884-1:2013, MOD)

GB/T 4365-2024 Electrotechnical terminology—Electromagnetic compatibility (IEC 60050-161: 2021, MOD)

GB/T 6113.101 Specification for radio disturbance and immunity measuring apparatus and methods—Part 1-1: Radio disturbance and immunity measuring apparatus—Measuring apparatus (GB/T 6113.101-2021, CISPR 16-1-1:2019, IDT)

GB/T 6113.102-2018 Specification for radio disturbance and immunity measuring apparatus and methods—Part 1-2: Radio disturbance and immunity measuring apparatus—Coupling devices for conducted disturbance measurements (CISPR 16-1-2:2014, IDT)

GB/T 9254.1-2021 Information technology equipment, multimedia equipment and receivers—Electromagnetic compatibility—Part 1: Emission requirements (CISPR 32:2015, MOD)

GB/T 19596-2017 Terminology of electric vehicles

GB/T 29259-2012 Road vehicle – Electromagnetic compatibility terminology

GB/T 44119 Measurement method of antenna factor for 1m method radiated disturbance

3 TERMS AND DEFINITIONS

For the purpose of this document, the terms and definitions given in GB/T 4365-2024, GB/T 19596-2017 and GB/T 29259-2012 as well as the following apply.

3.1 antenna matching unit

device for matching the impedance of an antenna to that of the 50Ω measuring instrument over the antenna measuring frequency range

[Source: GB/T 29259-2012, 3.66]

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