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GB/T 33014.11-2023 English PDF (GBT33014.11-2023)

GB/T 33014.11-2023 English PDF (GBT33014.11-2023)

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GB/T 33014.11-2023: Road vehicles - Component test methods for electrical/ electronic disturbances fromnarrowband radiated electromagnetic energy - Part 11: Reverberation chamber
GB/T 33014.11-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.10
CCS T 36
Road vehicles - Component test methods for electrical /
electronic disturbances from narrowband radiated
electromagnetic energy - Part 11: Reverberation chamber
(ISO 11452-11:2010, Road vehicles - Component test methods for electrical
disturbances from narrowband radiated electromagnetic energy - Part 11:
Reverberation chamber, MOD)
ISSUED ON: SEPTEMBER 07, 2023
IMPLEMENTED ON: APRIL 01, 2024
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 4
Introduction ... 6
1 Scope ... 8
2 Normative references ... 8
3 Terms and definitions ... 8
4 Test conditions ... 10
5 Test locations ... 11
5.1 General ... 11
5.2 Reverberation chamber ... 11
6 Test equipment and instruments ... 11
6.1 Isotropic electric field probe ... 11
6.2 RF signal source ... 12
6.3 Transmitting and receiving antennas ... 12
6.4 Power amplifier ... 12
6.5 Spectrum analyzer ... 12
6.6 Directional coupler ... 12
6.7 Power meter ... 12
6.8 Computer control ... 12
6.9 DUT actuator and monitoring equipment ... 13
7 Test layout ... 13
7.1 General ... 13
7.2 Ground plane and DUT grounding ... 13
7.3 Power and artificial network (AN) ... 14
7.4 Location of DUT and wiring harness ... 15
7.5 Location of artificial load ... 15
7.6 Location of transmitting antenna ... 15
7.7 Location of receiving antenna ... 16
8 Test methods ... 17
8.1 Test plan ... 17
8.2 Test procedures ... 18
8.3 Test report ... 20
Annex A (Informative) Function performance status classification (FPSC) ... 21
A.1 General ... 21
A.2 Severity levels ... 21
Annex B (Normative) Reverberation room validation under tuning mode ... 22
B.1 General ... 22
B.2 Test procedures ... 24
B.3 Reverberation chamber gain ... 25
B.4 Field uniformity ... 26
B.5 Receiving antenna characterization factor (ACF) ... 28
B.6 Lowest usable frequency (LUF) ... 28
B.7 Maximum chamber loading factor (MLF) ... 28
Annex C (Normative) Loading effect calibration of reverberation chamber... 30
C.1 General ... 30
C.2 Test procedures ... 30
C.3 Chamber characterization factor ... 31
C.4 Chamber loading factor ... 31
C.5 Minimum pulse width ... 32
Annex D (Normative) Artificial network (AN) ... 34
D.1 General ... 34
D.2 Impedance of AN ... 34
Bibliography ... 36
Road vehicles - Component test methods for electrical /
electronic disturbances from narrowband radiated
electromagnetic energy - Part 11: Reverberation chamber
1 Scope
This document establishes the immunity test method for vehicle electrical/electronic
components to continuous narrowband radiated electromagnetic disturbance –
reverberation chamber.
This document establishes the test method for applying electromagnetic interference to
the device under test (hereinafter referred to as DUT) and the wiring harness (real
vehicle wiring harness or standard test wiring harness) in the reverberation chamber.
During the test, the support equipment of the DUT can be arranged either inside the
reverberation chamber or outside the reverberation room. The test shall be performed
under the tuning mode.
This document applies to the immunity test of electrical/electronic components for M,
N, O, and L category vehicles (not limited to vehicle power systems, such as spark
ignition engines, diesel engines, and electric motors).
2 Normative references
The following documents are referred to in the text in such a way that some or all of
their content constitutes requirements of this document. For dated references, only the
version corresponding to that date is applicable to this document; for undated references,
the latest version (including all amendments) is applicable to this document.
GB/T 33014.1, Road vehicles - Component test methods for electrical/electronic
disturbances from narrowband radiated electromagnetic energy - Part 1: General
(GB/T 33014.1-2016, ISO 11452-1:2005, MOD)
3 Terms and definitions
Terms and definitions determined by GB/T 33014.1, and the following ones are
applicable to this document.
3.1
antenna characterization factor; ACF
-- test temperature;
-- test voltage;
-- modulation system;
-- dwell time;
-- test signal quality.
5 Test locations
5.1 General
The test shall be carried out in a reverberation chamber.
5.2 Reverberation chamber
The reverberation chamber used to test the DUT shall be so large that its working
volume can accommodate the test bench, support equipment and receiving antennas.
Note 1: Reverberation chamber size will affect the lowest usable frequency (LUF).
The working volume is usually rectangular which, however, is not essential.
The reverberation chamber shall contain at least one mechanical tuner to stir the
electromagnetic field in the chamber. Based on the reverberation chamber size and
working volume, the size of the mechanical tuner shall be as large as possible. In
addition, the shape of each tuner shall be such that during one rotation, the reverberation
chamber obtains a non-repetitive field distribution.
Note 2: The number, size and shape of tuners will affect the lowest usable frequency
(LUF).
After the reverberation chamber is built, the reverberation chamber validation shall be
performed according to Annex B. The field uniformity shall meet the requirements of
Table B.2, and the LUF of the reverberation chamber shall be confirmed. After any
major renovation, reverberation chamber validation shall be performed again. Tuner
changes shall be considered a major modification.
6 Test equipment and instruments
6.1 Isotropic electric field probe
The electric field probe shall be able to measure the electrical field strength on three
orthogonal axes.
6.2 RF signal source
The RF signal source shall be able to cover the specified frequency range and
modulation system.
6.3 Transmitting and receiving antennas
Linear polarizing antennas that meet the transmitting and receiving frequency
requirements respectively shall be used. Antenna efficiency shall be at least 75% (log-
periodic antennas and horn antennas usually meet this requirement). It is allowable to
use multiple antennas to cover the entire frequency range of the reverberation chamber.
6.4 Power amplifier
Power amplifiers are used to amplify radio frequency signals and provide the necessary
power to the transmitting antenna to generate the specified field strength.
6.5 Spectrum analyzer
The spectrum analyzer shall be able to cover the specified frequency range. Confirm
and test the reverberation chamber using a spectrum analyzer and receiving antenna
with and without a DUT.
6.6 Directional coupler
The directional coupler shall be able to cover the specified frequency range. It shall be
able to withstand the RF output of the power amplifier without damage. The directional
coupler is used in conjunction with the power meter to measure the forward power
delivered to the transmitting antenna.
6.7 Power meter
The power meter shall be able to cover the specified frequency range. The power meter
is used in conjunction with the directional coupler to measure the forward power
delivered to the transmitting antenna.
6.8 Computer control
The computer control system shall have the following fun...
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