Road vehicles—Component test methods for electrical/electronic disturbances from narrowband radiated electromagnetic energy—Part 9:Portable transmitters
Road vehicles - Component test methods for electrical/electronic disturbances from narrowband radiated electromagnetic energy-
Part 9: Portable transmitters
1 Scope
This part of GB/T 33014 specifies component test methods for electrical/electronic disturbances from narrowband radiated electromagnetic energy- portable transmitters.
This part applies to the electrical/electronic components of M, N, O and L vehicles (regardless of the propulsion system, e.g. spark-ignition engine, diesel engine, electric motor).
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 33014.1 Road vehicles- Component test methods for electrical/electronic disturbances from narrowband radiated electromagnetic energy - Part 1: General (GB/T33014.1-2016, ISO11452-1:2005, MOD)
GB/T 33014.2-2016 Road vehicles - Component test methods for electrical/electronic disturbances from narrowband radiated electromagnetic energy - Part 2: Absorber-lined shielded enclosure (ISO11452-2:2004, MOD)
Guidelines for Limiting Exposure to Time-Varying Electric,Magnetic,and Electromagnetic Fields(up to 300 GHz) International Commission on Non-Lonizing Radiation Protection (ICNIRP)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 33014.1 apply.
4 Test conditions
The applicable frequency range of the test method is 26 MHz to 5.85 GHz. The users of this standard shall specify the test severity level or levels over the frequency bands. The test severity level shall take into account
- typical portable transmitter characteristics (frequency bands, power level and modulation), given in Annex A, and
- the characteristics of the antenna(s) used for this test.
Note: Annex A is for information only and cannot be considered as an exhaustive description of various portable transmitters.
Standard test conditions are given in GB/T 33014.1 for the following:
- test temperature;
- test voltage;
- dwell time;
- test signal quality.
5 Test location
The test shall be conducted in an anechoic chamber.
Basically, an anechoic chamber shall have absorbing material on its internal refective surfaces, optionally excluding the floor, but the refected energy in the test area shall be at least 10 dB less than the direct energy.
6 Test instrumentation
6.1 General
The feld-generating device can be
- commercial portable transmitters with integral antennas, or
- simulated portable transmitters, with an antenna used as described in 6.3.4 and an amplifer.
To reduce test error, the operation of the DUT is usually monitored by fbre-optic couplers.
6.2 Commercial portable transmitters
Commercial portable transmitters having an integral antenna are a convenient and readily available feld-generating device.
6.3 Simulated portable transmitters
6.3.1 General
Simulated portable transmitters consist of
- radio frequency (RF) signal generating equipment, and
- RF power monitoring equipment and antennas.
6.3.2 RF signal generating equipment
Signal sources with internal or external modulation capability.
Power amplifer(s): multiple RF amplifers may be required to cover the range of test frequencies.
6.3.3 RF power monitoring equipment
An in-line power meter is required when using simulated portable transmitters for measuring power to the antenna. Both forward and reverse power shall be measured and recorded.
6.3.4 Antennas
The simulated portable transmitter antenna shall be a passive antenna as detailed in B.2. Examples of other antennas which may be used are presented in Annex B.
All antennas shall be tuned for a minimum voltage standing wave ratio (VSWR) of typically less than 4:1. The resulting VSWR has to be compatible with the design of the RF source. The VSWR value shall be recorded at the lower and upper band edges and at middle frequency.
6.4 Actuator and monitor of DUT
The DUT shall be operated by actuators which have a minimum effect on the electromagnetic characteristics.
Example: Plastic blocks on the push-buttons, pneumatic actuators (plastic tubes for supply air line).
Connections to equipment monitoring electromagnetic interference reactions of the DUT shall be accomplished by using fbre-optics or high-resistance leads. Other types of leads may be used but require extreme care to minimize interactions. The orientation, length and location of such leads shall be carefully documented to ensure repeatability of test results.
Any electrical connection of monitoring equipment to the DUT could cause malfunctions of the DUT. Care shall be taken to avoid such an effect.
7 Test set-up
7.1 Ground plane
The ground plane shall be made of 0.5 mm thick (minimum) copper, brass or galvanized steel. The minimum width of the ground plane shall be 1,000 mm. The minimum length of the ground plane shall be 2,000 mm, or the underneath of the entire equipment plus 200 mm, whichever is larger.
The height of the ground plane (test bench) shall be (900 ± 100) mm above the foor. The ground plane shall be bonded to the shielded enclosure such that the DC resistance does not exceed 2.5 mΩ. In addition, the bond straps shall be placed no greater than 300m.
7.2 Power supply and artifcial networks (AN)
Each DUT power supply lead shall be connected to the power supply through an artifcial network (AN).
Power supply is assumed to be negative ground. If the DUT utilizes positive ground then the test set-up need to be adapted accordingly. Power shall be applied to the DUT via a 5 µH/50 Ω AN (see Annex A of GB/T33014.2-2016). The number of AN required depends on the intended DUT installation in the vehicle:
- for remotely grounded DUTs (vehicle power return line longer than 200 mm), two ANs are required – one for the positive supply line and the other for the power return line (see Annex B of GB/T33014.2-2016);
- for locally grounded DUTs (vehicle power return line 200 mm or shorter), only one AN is required, for the positive supply (see Annex B of GB/T33014.2-2016).
The AN(s) shall be mounted directly on the ground plane. AN cases shall be bonded to the ground plane.
The power supply return shall be connected to the ground plane, between the power supply and the AN(s).
The measuring port of each AN shall be terminated with a 50 Ω load.
Standard
GB/T 33014.9-2020 Road vehicles—Component test methods for electrical/electronic disturbances from narrowband radiated electromagnetic energy—Part 9:Portable transmitters (English Version)
Standard No.
GB/T 33014.9-2020
Status
valid
Language
English
File Format
PDF
Word Count
20000 words
Price(USD)
550.0
Implemented on
2021-7-1
Delivery
via email in 1~2 business day
Detail of GB/T 33014.9-2020
Standard No.
GB/T 33014.9-2020
English Name
Road vehicles—Component test methods for electrical/electronic disturbances from narrowband radiated electromagnetic energy—Part 9:Portable transmitters
Road vehicles - Component test methods for electrical/electronic disturbances from narrowband radiated electromagnetic energy-
Part 9: Portable transmitters
1 Scope
This part of GB/T 33014 specifies component test methods for electrical/electronic disturbances from narrowband radiated electromagnetic energy- portable transmitters.
This part applies to the electrical/electronic components of M, N, O and L vehicles (regardless of the propulsion system, e.g. spark-ignition engine, diesel engine, electric motor).
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 33014.1 Road vehicles- Component test methods for electrical/electronic disturbances from narrowband radiated electromagnetic energy - Part 1: General (GB/T33014.1-2016, ISO11452-1:2005, MOD)
GB/T 33014.2-2016 Road vehicles - Component test methods for electrical/electronic disturbances from narrowband radiated electromagnetic energy - Part 2: Absorber-lined shielded enclosure (ISO11452-2:2004, MOD)
Guidelines for Limiting Exposure to Time-Varying Electric,Magnetic,and Electromagnetic Fields(up to 300 GHz) International Commission on Non-Lonizing Radiation Protection (ICNIRP)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 33014.1 apply.
4 Test conditions
The applicable frequency range of the test method is 26 MHz to 5.85 GHz. The users of this standard shall specify the test severity level or levels over the frequency bands. The test severity level shall take into account
- typical portable transmitter characteristics (frequency bands, power level and modulation), given in Annex A, and
- the characteristics of the antenna(s) used for this test.
Note: Annex A is for information only and cannot be considered as an exhaustive description of various portable transmitters.
Standard test conditions are given in GB/T 33014.1 for the following:
- test temperature;
- test voltage;
- dwell time;
- test signal quality.
5 Test location
The test shall be conducted in an anechoic chamber.
Basically, an anechoic chamber shall have absorbing material on its internal refective surfaces, optionally excluding the floor, but the refected energy in the test area shall be at least 10 dB less than the direct energy.
6 Test instrumentation
6.1 General
The feld-generating device can be
- commercial portable transmitters with integral antennas, or
- simulated portable transmitters, with an antenna used as described in 6.3.4 and an amplifer.
To reduce test error, the operation of the DUT is usually monitored by fbre-optic couplers.
6.2 Commercial portable transmitters
Commercial portable transmitters having an integral antenna are a convenient and readily available feld-generating device.
6.3 Simulated portable transmitters
6.3.1 General
Simulated portable transmitters consist of
- radio frequency (RF) signal generating equipment, and
- RF power monitoring equipment and antennas.
6.3.2 RF signal generating equipment
Signal sources with internal or external modulation capability.
Power amplifer(s): multiple RF amplifers may be required to cover the range of test frequencies.
6.3.3 RF power monitoring equipment
An in-line power meter is required when using simulated portable transmitters for measuring power to the antenna. Both forward and reverse power shall be measured and recorded.
6.3.4 Antennas
The simulated portable transmitter antenna shall be a passive antenna as detailed in B.2. Examples of other antennas which may be used are presented in Annex B.
All antennas shall be tuned for a minimum voltage standing wave ratio (VSWR) of typically less than 4:1. The resulting VSWR has to be compatible with the design of the RF source. The VSWR value shall be recorded at the lower and upper band edges and at middle frequency.
6.4 Actuator and monitor of DUT
The DUT shall be operated by actuators which have a minimum effect on the electromagnetic characteristics.
Example: Plastic blocks on the push-buttons, pneumatic actuators (plastic tubes for supply air line).
Connections to equipment monitoring electromagnetic interference reactions of the DUT shall be accomplished by using fbre-optics or high-resistance leads. Other types of leads may be used but require extreme care to minimize interactions. The orientation, length and location of such leads shall be carefully documented to ensure repeatability of test results.
Any electrical connection of monitoring equipment to the DUT could cause malfunctions of the DUT. Care shall be taken to avoid such an effect.
7 Test set-up
7.1 Ground plane
The ground plane shall be made of 0.5 mm thick (minimum) copper, brass or galvanized steel. The minimum width of the ground plane shall be 1,000 mm. The minimum length of the ground plane shall be 2,000 mm, or the underneath of the entire equipment plus 200 mm, whichever is larger.
The height of the ground plane (test bench) shall be (900 ± 100) mm above the foor. The ground plane shall be bonded to the shielded enclosure such that the DC resistance does not exceed 2.5 mΩ. In addition, the bond straps shall be placed no greater than 300m.
7.2 Power supply and artifcial networks (AN)
Each DUT power supply lead shall be connected to the power supply through an artifcial network (AN).
Power supply is assumed to be negative ground. If the DUT utilizes positive ground then the test set-up need to be adapted accordingly. Power shall be applied to the DUT via a 5 µH/50 Ω AN (see Annex A of GB/T33014.2-2016). The number of AN required depends on the intended DUT installation in the vehicle:
- for remotely grounded DUTs (vehicle power return line longer than 200 mm), two ANs are required – one for the positive supply line and the other for the power return line (see Annex B of GB/T33014.2-2016);
- for locally grounded DUTs (vehicle power return line 200 mm or shorter), only one AN is required, for the positive supply (see Annex B of GB/T33014.2-2016).
The AN(s) shall be mounted directly on the ground plane. AN cases shall be bonded to the ground plane.
The power supply return shall be connected to the ground plane, between the power supply and the AN(s).
The measuring port of each AN shall be terminated with a 50 Ω load.
