GB/T 33014.7-2020 Road vehicles—Component test methods for electrical/electronic disturbances from narrowband radiated electromagnetic energy—Part 7:Direct radio frequency power injection (English Version)
Road vehicles—Component test methods for electrical/electronic disturbances from narrowband radiated electromagnetic energy—Part 7:Direct radio frequency power injection
GB/T 33014.7-2020 Road vehicles—Component test methods for electrical/electronic disturbances from narrowband radiated electromagnetic energy—Part 7:Direct radio frequency power injection English
1 Scope
This part of GB/T 33014 specifies component test methods for electrical/electronic disturbances from narrowband radiated electromagnetic energy- direct radio frequency power injection.
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)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 33014.1 apply.
4 Test conditions
4.1 Standard test conditions
Standard test temperature, test voltage, modulation, dwell time and frequency step size information shall be in accordance with GB/T 33014.1.
4.2 Frequency range
The upper limit of the test is limited by resonances and parasitic capacitances to ground in the broadband artificial network (BAN) and leads from the BAN to the device under test (DUT). By using an appropriate BAN, a useful frequency range of 0.25 MHz to 500 MHz can be readily achieved.
See Annex A for information on BAN construction.
4.3 Test severity levels
The users shall specify the test severily levels over the frequerncy rarige (see Annex B). These levels are expressed in terms of the equivalent root-mean-square value of the unmodulated wave.
The test severity level is measured at the output of the blocking capacitor (item 6 in Figure 1). The RF sampling device is used to control the RF power during the test. Mismatch between the 50Ω coaxial transmission line and the load consisting of the BAN and the DUT lead is disregarded.
Key
1 ——RF signal generator
2 ——RF amplifier(s) (10 W to 25 W, typical)
3 ——spectrum analyzer or RF power meter
4——RF sampling device (sampling "T" or directional coupler), 50 Ω, 25 W, rating, 30 dB isolation
5 ——attenuator (50 Ω,10 dB,10 W)
6 ——d.c. blocking capacitor (impedance less than 5Ω across entire trequency range)
7 ——peripherals
8 ——BAN, one in series with each lead except RF reference ground (see Figure A.1 for connector numbering 1 to 3)
9 ——DUT;
10——RF power meter (for calibration)
11——coaxial transmission line (double shielded or equivalent)
12——ground plane
13——programmable controller and data acquisition equipment (optional)
14——instrumontation data bus
a Lead length from BAN to DUT shall be ≤150 mm.
Figure 1 Example of RF power injection test configuration
5 Test apparatus
5.1 General
Direct RF power injection is a technique whereby RF power is injected into the operating DUT, while eliminating variables related to wiring harness length and routing. The RF power is injected directly into the DUT at its connector pins.
In preparation for performing a test, the power delivered through the d.c. blocking capacitor is measured on a calibrated power meter while the reference level at the RF sampling device ("sampling tee”or directional coupler) is recorded so that it can be used for the DUT test.
The DUT is connected in the test setup to perform its designated functions. The BAN is a device that presents controlled impedance to isolate the DUT from sensors/oads over a specified frequency range while allowing the DUT to be interfaced to its sensors and loads.
In cases where the characteristics of the BAN significantly affects an input signal waveform (e.g. data bus signals), a special BAN with lower series impedance may be used. In such cases, document the characteristics of the distortion or characteristics of the special BAN, or both, in the test report. .
Standard
GB/T 33014.7-2020 Road vehicles—Component test methods for electrical/electronic disturbances from narrowband radiated electromagnetic energy—Part 7:Direct radio frequency power injection (English Version)
Standard No.
GB/T 33014.7-2020
Status
valid
Language
English
File Format
PDF
Word Count
7500 words
Price(USD)
200.0
Implemented on
2021-7-1
Delivery
via email in 1~2 business day
Detail of GB/T 33014.7-2020
Standard No.
GB/T 33014.7-2020
English Name
Road vehicles—Component test methods for electrical/electronic disturbances from narrowband radiated electromagnetic energy—Part 7:Direct radio frequency power injection
GB/T 33014.7-2020 Road vehicles—Component test methods for electrical/electronic disturbances from narrowband radiated electromagnetic energy—Part 7:Direct radio frequency power injection English
1 Scope
This part of GB/T 33014 specifies component test methods for electrical/electronic disturbances from narrowband radiated electromagnetic energy- direct radio frequency power injection.
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)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 33014.1 apply.
4 Test conditions
4.1 Standard test conditions
Standard test temperature, test voltage, modulation, dwell time and frequency step size information shall be in accordance with GB/T 33014.1.
4.2 Frequency range
The upper limit of the test is limited by resonances and parasitic capacitances to ground in the broadband artificial network (BAN) and leads from the BAN to the device under test (DUT). By using an appropriate BAN, a useful frequency range of 0.25 MHz to 500 MHz can be readily achieved.
See Annex A for information on BAN construction.
4.3 Test severity levels
The users shall specify the test severily levels over the frequerncy rarige (see Annex B). These levels are expressed in terms of the equivalent root-mean-square value of the unmodulated wave.
The test severity level is measured at the output of the blocking capacitor (item 6 in Figure 1). The RF sampling device is used to control the RF power during the test. Mismatch between the 50Ω coaxial transmission line and the load consisting of the BAN and the DUT lead is disregarded.
Key
1 ——RF signal generator
2 ——RF amplifier(s) (10 W to 25 W, typical)
3 ——spectrum analyzer or RF power meter
4——RF sampling device (sampling "T" or directional coupler), 50 Ω, 25 W, rating, 30 dB isolation
5 ——attenuator (50 Ω,10 dB,10 W)
6 ——d.c. blocking capacitor (impedance less than 5Ω across entire trequency range)
7 ——peripherals
8 ——BAN, one in series with each lead except RF reference ground (see Figure A.1 for connector numbering 1 to 3)
9 ——DUT;
10——RF power meter (for calibration)
11——coaxial transmission line (double shielded or equivalent)
12——ground plane
13——programmable controller and data acquisition equipment (optional)
14——instrumontation data bus
a Lead length from BAN to DUT shall be ≤150 mm.
Figure 1 Example of RF power injection test configuration
5 Test apparatus
5.1 General
Direct RF power injection is a technique whereby RF power is injected into the operating DUT, while eliminating variables related to wiring harness length and routing. The RF power is injected directly into the DUT at its connector pins.
In preparation for performing a test, the power delivered through the d.c. blocking capacitor is measured on a calibrated power meter while the reference level at the RF sampling device ("sampling tee”or directional coupler) is recorded so that it can be used for the DUT test.
The DUT is connected in the test setup to perform its designated functions. The BAN is a device that presents controlled impedance to isolate the DUT from sensors/oads over a specified frequency range while allowing the DUT to be interfaced to its sensors and loads.
In cases where the characteristics of the BAN significantly affects an input signal waveform (e.g. data bus signals), a special BAN with lower series impedance may be used. In such cases, document the characteristics of the distortion or characteristics of the special BAN, or both, in the test report. .
