GB/T 33012.3-2016 PDF in English
GB/T 33012.3-2016 (GB/T33012.3-2016, GBT 33012.3-2016, GBT33012.3-2016)
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Road vehicles -- Vehicle test methods for electrical disturbances from narrowband radiated electromagnetic energy -- Part 3: On-board transmitter simulation
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Standards related to (historical): GB/T 33012.3-2016
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GB/T 33012.3-2016: PDF in English (GBT 33012.3-2016) GB/T 33012.3-2016
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.10
T 36
Road vehicles - Vehicle test methods for electrical
disturbances from narrowband radiated electromagnetic
energy - Part 3. On-board transmitter simulation
(ISO 11451-3.2007, MOD)
ISSUED ON. OCTOBER 13, 2016
IMPLEMENTED ON. MAY 1, 2017
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic of
China.
3. No action is required - Full-copy of this standard will be automatically &
immediately delivered to your EMAIL address in 0~60 minutes.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 5
4 Test conditions ... 6
5 Test location ... 6
6 Test instrumentation ... 7
7 Test set-up ... 9
8 Test procedure ... 15
Annex A (informative) Typical characteristics of on-board transmitters ... 19
Annex B (informative) Guidance on tuning antennas on the vehicle for minimum
VSWR ... 23
Foreword
GB/T 33012 “Road vehicles - Vehicle test methods for electrical disturbances from
narrowband radiated electromagnetic energy” consists of four parts.
- Part 1. General;
- Part 2. Off-vehicle radiation sources;
- Part 3. On-board transmitter simulation;
- Part 4. Bulk current injection (BCI).
This Part is Part 3 of GB/T 33012.
This Part is drafted in accordance with the rules given in GB/T 1.1-2009.
This Part uses the re-drafting method to amend and adopt ISO 11451-3.2007 “Road
vehicles - Vehicle test methods for electrical disturbances from narrowband radiated
electromagnetic energy - Part 3. On-board transmitter simulation”.
Technical differences between this Part and ISO 11451-3.2007 and the causes are as
follows.
- Clause 1 is normatively prepared according to the specifications of GB/T 1.1-2009;
- The normative reference ISO 11451-1 is modified to GB/T 33012.1 adopting ISO
11451-1;
- The normative reference ISO 11451-2 is modified to GB/T 33012.2 adopting ISO
11451-1.
The following editorial modifications are also made in This Part.
- DELETE the bibliography of the original international standard.
This Part is proposed by Ministry of Industry and Information Technology of the
People’s Republic of China.
This Part is under the jurisdiction of National Technical Committee on Automobiles of
Standardization Administration of China (SAC/TC 114).
Drafting organizations of this Part. China Automotive Technology Research Center,
Passenger Car Company of SAIC Motor Corporation Limited, Suzhou Tai Site
Electronic Technology Co., Ltd., Shanghai Automotive Commercial Vehicle Technology
Center, Changchun Automobile Testing Center, Shanghai Volkswagen Automobile Co.,
Ltd., China Electronics Standardization Institute, Shenzhen Hsac Electronics Co., Ltd.,
Road vehicles - Vehicle test methods for electrical
disturbances from narrowband radiated electromagnetic
energy - Part 3. On-board transmitter simulation
1 Scope
This Part of GB/T 33012 specifies the test conditions, test location, test equipment and
test procedure for vehicle test methods for electrical disturbances from narrowband
radiated electromagnetic energy - on-board transmitter simulation.
This Part applies to M, N and O vehicles (regardless of the vehicle power system, e.g.
spark-ignition engine, diesel engine, electric motor).
NOTE. On-board transmitters include on-board transmitters connected to an external antenna
and portable transmitters with integral antennas.
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 33012.1 Road vehicles - Vehicle test methods for electrical disturbances from
narrowband radiated electromagnetic energy - Part 1. General (GB/T 33012.1-2016,
ISO 11451-1.2005 + A1. 2008, MOD)
GB/T 33012.2 Road vehicles - Vehicle test methods for electrical disturbances from
narrowband radiated electromagnetic energy - Part 2. Off-vehicle radiation sources
(GB/T 33012.2-2016, ISO 11451-2.2005, MOD)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 33012.1
and the following apply.
3.1
integral antenna
6.4 Antennas
6.4.1 Transmitters with antenna outside the vehicle
6.4.1.1 Simulated on-board transmitters
When an OEM antenna is not installed on the vehicle, the antenna(s) described below
shall be used.
- For frequency ranges lower than 30 MHz, loaded antennas shall be used. Loaded
antennas employ lumped or distributed reactive components with a radiating
element physically shorter than quarter wave at resonance.
- For frequency ranges higher than 30 MHz, e.g. for the very high frequency (VHF)
and ultra-high frequency (UHF) bands, quarter wave antennas shall be given
preference over 5/8 wave antennas, since there are higher skin currents created
by quarter wave antennas.
All antennas shall be tuned on the vehicle for minimum voltage standing wave ratio
(VSWR, typically less than 2.1), unless otherwise specified in the test plan. As a
minimum, the VSWR value shall be recorded with the antenna on the vehicle at the
lower and upper band edge and at a middle frequency (see Annex B).
NOTE. The resulting VSWR is compatible with the design of the RF source.
When an OEM antenna is actually installed on the vehicle, this antenna shall be used
for the test in the appropriate frequency range. In this case, the VSWR shall not be
adjusted, but shall be recorded.
6.4.1.2 Commercial on-board transmitters
The vehicle OEM antenna shall be used for the test in the appropriate frequency range.
In this case, the VSWR shall not be adjusted.
6.4.2 Transmitters with antenna inside the vehicle
6.4.2.1 Simulated portable transmitter
A passive antenna (e.g. quarter wave antenna with counterpoise, sleeve antenna,
patch antenna) shall be used.
All antennas shall be tuned on the vehicle for minimum VSWR (typically less than 2.1),
unless otherwise specified in the test plan. The antenna shall be tuned in the laboratory
to obtain minimum required VSWR with the counterpoise that is intended to be used
with the antenna while testing in the vehicle.
As a minimum, the VSWR value shall be recorded with the antenna in the vehicle at
8 Test procedure
8.1 General
The general arrangement of vehicle, transmitter(s) and associated equipment
represents a standardized test condition. Any deviations from the standard test
configuration shall be agreed upon prior to testing and recorded in the test report.
The vehicle shall be made to operate under typical loading and operating conditions.
These operating conditions shall be clearly defined in the test plan.
8.2 Test plan
Prior to performing the tests, a test plan shall be generated which shall include.
- test set-up;
- frequency range(s) and associated modulation(s);
- duration of transmission;
- antenna location and polarization;
- routing of the coaxial cable to the antenna in the vehicle (for simulated on-board
transmitters);
- vehicle orientation;
- vehicle mode of operation;
- vehicle monitoring conditions;
- vehicle acceptance criteria;
- definition of test severity levels;
- maximum antenna VSWR value (if necessary);
- test report content;
- any special instructions and changes from the standard test.
8.3 Test method
8.3.1 Transmitters with antenna outside the vehicle
8.3.1.1 Simulated on-board transmitters
When required in the test plan, the immunity threshold shall be determined.
8.3.1.2 Commercial on-board transmitters
The vehicle is installed in the test facility as described in 7.1.2.
The test shall be performed with unmodified commercial on-board transmitter
characteristics (power, modulation, etc.) and the unmodified vehicle OEM antenna.
Any exception to this practice shall be specified in the test plan. Operate the
commercial on-board transmitter connected to the OEM antenna in the configuration(s)
indicated in the test plan, noting any anomalies.
Continue testing until all on-board transmitter(s) specified in the test plan are
completed.
8.3.2 Transmitters with antenna inside the vehicle
8.3.2.1 Simulated portable transmitters
The vehicle, antenna(s) and associated equipment are installed as described in 7.2.2.
The reference parameter for the test is the net power at the simulated portable
transmitter feed-point. The adjustment of the net power level shall be performed with
the simulated portable transmitter placed outside the vehicle (at a mini...
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Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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