GB 18655-2002 English PDF (GB18655-2002)

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GB 18655-2002: Limits and methods of measurement of radio disturbance characteristics for the protection of receivers used on board vehicles
GB 18655-2002
Limits and methods of measurement of radio disturbance characteristics for the protection of receivers used on board vehicles
GB 18655-2002
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 33.100
L 06
idt IEC/CISPR 25:1995
Limits and methods of measurement of radio
disturbance characteristics for the protection of
receivers used on board vehicles
Issued on: February 22, 2002 Implemented on: March 01, 2003
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine
Table of Contents
Foreword ...4 
IEC/CISPR Foreword ...5 
IEC/CISPR Introduction ...6 
Section 1: General ...7 
1 Scope ...7 
2 Normative references ...8 
3 Definitions ...8 
4 Requirements common to vehicle and component/module emissions
measurement ...11 
5 Antenna and impedance-matching requirements - Vehicle test ...16 
6 Test equipment unique to component/module tests ...18 
Section 2: Measurement of emissions received by an antenna on the same
vehicle ...23 
7 Field of application ...23 
8 Method of measurement ...23 
9 Limits for vehicle-radiated disturbances ...25 
Section 3: Measurement of vehicle components and modules ...26 
10 Field of application ...26 
11 Conducted emissions from component/module ...26 
12 Limits for conducted disturbances from components ...31 
13 Radiated emissions from component/module ...33 
14 Limits for radiated disturbances from components ...37 
15 Radiated emissions from component/module -TEM cell method ...38 
16 Limits for radiated disturbances from components - TEM cell method (both
the lead frame and EUT and the EUT-only methods) ...40 
17 Limits for disturbances radiated from integrated circuit - TEM cell method
...42 
Annex A (Normative) Antenna matching unit - Vehicle test ...43 
Annex B (Informative) Calibration procedure for shielded enclosure for
component testing ...45 
Annex C (Informative) Current probe requirements ...46 
Annex D (Informative) Notes on the suppression of disturbance ...48 
Annex E (Informative) TEM cell dimensions ...50 
Annex F (Informative) Artificial network schematic ...52 
Foreword
All technical contents of this Standard are mandatory.
This Standard identically adopts International Electrotechnical Commission/
Radio Interference Special Committee IEC/CISPR 25:1995 Limits and methods
of measurement of radio disturbance characteristics for the protection of
receivers used on board vehicles.
In Clause 16 of this Standard, for continuous emitters, the original text is
recommended to use level 5 in Band E and Band F.This Standard specifies to
use level 5 in Band E and Band F.
This Standard shall be issued for the first time.
This Standard shall be implemented from the date of publication and the
transition period begins in 1 year.
Annex A of this Standard is a normative annex.Annex B, Annex C, Annex D,
Annex E, Annex F are informative annexes.
This Standard was proposed by National Radio Interference Standardization
Technical Committee.
This Standard shall be under the jurisdiction of National Radio Interference
Standardization Technical Committee.
Main drafting organizations of this Standard: China Automotive Technology and
Research Center.
The drafting organizations of this Standard: Changchun Automobile Research
Institute, Dongfeng Automobile Engineering Research Institute, Shanghai
Volkswagen Automotive Co., Ltd., Shanghai General Motors Co., Ltd.
Main drafters of this Standard: Xu Li, Wang Yimin, Lin Yanping, Yang Xiaosong,
Wang Lian, Zhang Yifang.
Limits and methods of measurement of radio
disturbance characteristics for the protection of
receivers used on board vehicles
Section 1: General
1 Scope
This standard contains limits1 and procedures for the measurement of radio
disturbances in the frequency range of 150kHz to 1000MHz.The standard
applies to any electronic/electrical component intended for use in vehicles and
large devices.Refer to International Telecommunications Union (ITU)
publications for details of frequency allocations.The limits are intended to
provide protection for receivers installed in a vehicle from disturbances
produced by components/modules in the same vehicle2 .The methods and
limits for a complete vehicle are in Section 2 and the methods and limits for
components/modules are in Section 3.
The receiver types to be protected are: sound and television receivers3, land
mobile radio, radio telephone, amateur and citizens' radio.For the purpose of
this standard, a vehicle is a machine which is self-propelled.Vehicles include
(but are not limited to) passenger cars, trucks, agricultural tractors and snow
mobiles.
The limits in this standard are recommended and subject to modification as
agreed between the vehicle manufacturer and the component supplier.This
standard is also intended to be applied by manufacturers and suppliers of
components and equipment which are to be added and connected to the
vehicle harness or to an on-board power connector after delivery of the vehicle.
This standard does not include protection of electronic control systems from
radio frequency (r.f.) emissions, or from transient or pulse-type voltage
fluctuations.These subjects are expected to be included in ISO publications.
Since the mounting location, vehicle body construction and harness design can
1 Only a complete vehicle test can be used to determine the component compatibility with respect to a
vehicle's limit.
2 Adjacent vehicles can be expected to be protected in most situations.
3 Adequate television protection will result from compliance with the levels at the mobile service
frequencies.