Vehicles, boats and internal combustion engine - Radio disturbance characteristics - Limits and methods of measurement for the protection of off-board receivers
1 Scope
The limits in this standard are designed to provide protection for broadcast receivers in the frequency range of 30 MHz to 1 000 MHz when used in the residential environment. Compliance with this standard may not provide adequate protection for new types of radio transmissions or receivers used in the residential environment nearer than 10 m to the vehicle, boat or device.
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This standard applies to the emission of electromagnetic energy which may cause interference to radio reception and which is emitted from
a) vehicles propelled by an internal combustion engine, electrical means or both (see 3.1);
b) boats propelled by an internal combustion engine, electrical means or both (see 3.2). Boats are to be tested in the same manner as vehicles except where they have unique characteristics as explicitly stated in this standard;
c) devices equipped with internal combustion engines or traction batteries (see 3.3).
See Appendix G for a flow chart to help determine the applicability of this standard.
This standard does not apply to aircrafts, household appliances, traction systems (railway, tramway and electric trolley bus), or to incomplete vehicles. In the case of a dual-mode trolley bus (e.g. propelled by power from either a.c./d.c. mains or an internal combustion engine), the internal combustion propulsion system shall be included, but the a.c./d.c. mains portion of the vehicle propulsion system shall be excluded from this standard.
Note 2: Protection of receivers used on board the same vehicle as the disturbance source(s) are covered by GB/T 18655.
The measurement of electromagnetic disturbances while the vehicle is connected to power mains for charging is not covered in this standard. The user is referred to appropriate national standards which define measurement techniques and limits for this condition.
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.
GB/T 4365 Electrotechnical terminology — Electromagnetic compatibility (IEC 60050(161):1990, IDT)
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 (CISPR 16-1-1:2006, IDT)
GB/T 6113.103 Specification for radio disturbance and immunity measuring apparatus and methods — Part 1-3: Radio disturbance and immunity measuring apparatus-Ancillary equipment — Disturbances power (CISPR 16-1-3:2004, IDT)
GB/T 6113.104 Specification for radio disturbance and immunity measuring apparatus and methods — Part 1-4: Radio disturbance and immunity measuring apparatus-Ancillary equipment — Radiated disturbances (CISPR 16-1-4:2005, IDT)
GB/T 18655 Vehicles boats and internal combustion engines - Radio disturbance characteristics - Limits and methods of measurement for the protection of on-board receivers (IEC/CISPR 25:1995, IDT)
CISPR 16-2-3:2006 Specification for radio disturbance and immunity measuring apparatus and methods — Part 2-3: Methods of measurement of disturbances and immunity Radiated disturbance measurements
3 Terms and Definitions
For the purpose of this part, the terms and definitions given in GB/T 4365 and the following apply.
Foreword III
1 Scope
2 Normative References
3 Terms and Definitions
4 Limits of Disturbance
4.1 Determination of conformance of vehicle/boat/device with limits
4.2 Peak and quasi-peak detector limits
4.3 Average detector limit
5 Methods of Measurement
5.1 Measuring instrument
5.2 Measuring location requirements
5.3 Test object conditions
5.4 Data collection
6 Methods of Checking for Compliance
6.1 General
6.2 Application of limit curves
6.3 Evaluation (general)
6.4 Type approval test
6.5 Surveillance (quality audit) of series production
6.6 Quick prototype check for development testing (optional, quasi-peak detector emissions only)
Appendix A (Normative) Statistical Analysis of the Results of Measurements
Appendix B (Normative) Procedure to Determine an Alternative Emission Limit for Measurements at 3m Antenna Distance
Appendix C (Informative) Antenna and Transmission Line Maintenance and Characterization
Figure C.1 Alternate Antenna Factor Determination (10m Antenna Distance)
Appendix D (Informative) Construction Features of Motor Vehicles Affecting the Emission of Ignition Noise
Appendix E (Informative) Measurement of the Insertion Loss of Ignition Noise Suppressors
Appendix F (Informative) Methods of Measurement to Determine the Attenuation Characteristics of Ignition Noise Suppressors for High Voltage Ignition Systems
Appendix G (Informative) Flow Chart for Checking the Applicability of GB
Figure 1 Method of Determination of Conformance
Figure 2 Limit of Disturbance (Peak and Quasi-peak Detector) at 10m Antenna Distance
Figure 3 Limits of Disturbance (Average Detector) at 10m Antenna Distance
Figure 4 Measuring Site (OTS) for Vehicles and Devices
Figure 5 Measuring Site (OTS) for Boats
Figure 6 Antenna Position to Measure Emissions — Vertical Polarization
Figure 7 Antenna Position to Measure Emissions — Horizontal Polarization
Figure B.1 Determination of the Maximum Antenna Angle
Figure B.2 Calculation of the Resulting Gain Reduction a
Figure C.1 Alternate Antenna Factor Determination (10m Antenna Distance)
Figure E.1 Test Circuit
Figure E.2 General Arrangement of the Test Box
Figure E.3 Details of the Test Box Lid
Figure E.4 Details of the Test Box
Figure E.5 Straight Spark-plug Ignition Noise Suppressor (Screened or Unscreened)
Figure E.6 Right-angle Spark-plug Ignition Noise Suppressor (Screened or Unscreened)
Figure E.7 Noise Suppression Spark-plug
Figure E.8 Resistive Distributor Brush
Figure E.9 Noise Suppressor in Distributor Cap
Figure E.10 Noise Suppression Distributor Rotor
Figure E.11 Noise Suppression Ignition Cable (Resistive or Reactive)
Figure F.1 Test Set-up (Side View)
Figure F.2 Test Set-up (Top View)
Figure F.3 Pressure Chamber with Ventilation
Figure F.4 Top View of the Set-up of a Right-angle Ignition Noise Suppressor for Distributors
Figure F.5 Location of High Voltage Ignition Components
Figure F.6 Top View of the Test Set-up for Distributor Rotors
Figure F.7 Side View of the Test Set-up for Ready-to-use Resistive Ignition Cables
Figure G.1 Flow Chart for Checking the Applicability of GB
Table 1 Spectrum Analyzer Parameters
Table 2 Scanning Receiver Parameters
Table 3 Internal Combustion Engine Operating Speeds
Table A.1 Statistical Factors
Table A.2 Example of Frequency Sub-bands
Table F.1 Limits
