Comparison of differences between common EMC experimental items in automotive electronics and those corresponding to military standards_Century Wisdom (Suzhou) Testing Technology Co., Ltd

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Comparison of differences between common EMC experimental items in automotive electronics and those corresponding to military standards

Release time:

2023-02-02 14:43

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　　1 Introduction to Standards

In China's automotive electronic EMC regular test used more standards as shown in Table 1.

GJB 151B-2013 integrates the contents of GJB 151A-97 and GJB152A-97, and supplements and modifies some contents. The test items of GJB 151B-2013 are shown in Table 2.

Table 1 Common EMC test standards for automotive electronics

Serial Number	Standard	Standard Content	Test Items
1	GB/T 18655-2018 CISPR 25:2016	Vehicles, boats and internal combustion engines-Radio disturbance characteristics-Limits and methods of measurement for the protection of on-board receivers	Radiated emission conducted emission
2	GB/T 21437.2-2008 ISO 7637-2:2004	Road vehicles-Electrical disturbances from conduction and coupling-Part 2: Electrical transient conduction along power lines	Power Line Transient Conduction Immunity
3	ISO 7637-2:2011	Road vehicles — Electrical disturbances from conduction and coupling — Part 2: Electrical transient conduction along supply lines only	Power Line Transient Conduction Immunity
4	GB/T 21437.3-2012 ISO 7637-3:2007	Road vehicles-Electrical disturbances from conduction and coupling-Part 3: Electrical transient emission from conductors other than mains by capacitive and thankful coupling	Signal Line Transient Conducted Immunity
5	ISO 7637-3:2016	Road vehicles — Electrical disturbances from conduction and coupling — Part 3: Electrical transient transmission by capacitive and inductive coupling via lines other than supply lines	Signal Line Transient Conducted Immunity
6	GB/T 17619-1998	Limits and methods of measurement for electromagnetic radiation immunity of motor vehicle electrical and electronic components	Electromagnetic radiation immunity
7	GB/T 33014.2-2016 ISO 11452-2:2004	Road vehicles-Immunity of electrical and electronic components to narrowband radiated electromagnetic energy-Test methods-Part 2: Anechoic chamber method	Radiated RF Immunity
8	GB/T 33014.4-2016 ISO 11452-4:2011	Road vehicles-Immunity of electrical and electronic components to narrowband radiated electromagnetic energy-Test methods-Part 4: Current injection (BCI) method	High current injection method (BCI)
9	ISO 11452-8:2015	Road vehicles — Component test methods for electrical disturbances from narrowband radiated electromagnetic energy — Part 8: Immunity to magnetic fields	low frequency magnetic field immunity
10	GB/T 19951-2019	Road vehicles-Test methods for immunity of electrical and electronic components to electrostatic discharge	Electrostatic Discharge Immunity
11	ISO-10605	Road vehicles — Test methods for electrical disturbances from electrostatic discharge	Electrostatic Discharge Immunity

Table 2 GJB 151B-2013 Test Items

Serial Number	Test Item	Test content
1	CE101	25Hz~10kHzPower Line Conducted Emission
2	CE102	10kHz~10MHzPower Line Conducted Emission
3	CE106	10kHz~40GHzantenna terminal conducted emission
4	CE107	Power line spike (time domain) conducted emission
5	CS101	25Hz~150kHzPower line conduction sensitivity
6	CS102	25Hz~50kHzGround Conduction Sensitivity
7	CS103	15kHz~10GHzAntenna Port Intermodulation Conducted Sensitivity
8	CS104	25Hz~20GHzantenna port unwanted signal suppression conduction sensitivity
9	CS105	25Hz~20GHzantenna port intermodulation conduction sensitivity
10	CS106	Power line spike signal conduction sensitivity
11	CS109	50Hz~100kHzShell Current Conduction Sensitivity
12	CS112	Electrostatic Discharge Sensitivity
13	CS114	4kHz~400MHzConduction sensitivity of cable bundle injection
14	CS115	Conduction sensitivity of cable bundle injection pulse excitation
15	CS116	10kHz~100MHzCable and power line damped sinusoidal transient conduction sensitivity
16	RE101	25Hz~100kHzmagnetic field radiation emission
17	RE102	10kHz~18GHzelectric field radiation emission
18	RE103	10kHz~40GHzAntenna harmonics and spurious output radiated emission
19	RS101	25Hz~100kHzmagnetic field radiation sensitivity
20	RS103	10kHz~40GHzelectric field radiation sensitivity
21	RS105	transient electromagnetic field radiation sensitivity

2 Comparison of common test items

The following is a description of the differences between several commonly used automotive electronic EMC test items and the corresponding items in the GJB151B-2013.

2.1GB/T 18655 Component/Module Conduction Disturbance (Current Method) and GJB 151B-2013 CE101

Table 3

Test Items	GB/T 18655 Component/Module Conducted Disturbance (Current Method)	GJB 151B-2013 CE101Power Line Conducted Emission
Test harness	Power line, control line and signal line	Equipment power cord including return line
Test frequency	0.15MHz~245MHz	25Hz~10kHz
Limits	According to the different frequency range, the segmentation limit is divided into Level 1 ~ Level 5 according to different grades.	According to different platforms, it is suitable for submarines, surface ships and submarines, naval aircraft, army aircraft, etc. Different limits are selected according to different load current, input power, EUT rated voltage, etc.
Main test equipment	Receivers, current probes, impedance stabilization networks, etc.	Receivers, current probes, impedance stabilization networks, etc.
Detection mode	PK、QP、AV	PK
Current Probe Location	Distance EUT50mm and 750mm	Distance LISN 50mm

2.2GB/T 18655 Component/Module Conducted Disturbance (Voltage Method) and GJB 151B-2013 CE102

Table 4

Test Items	GB/T 18655 Component/Module Conducted Disturbance (Voltage Method)	GJB 151B-2013 CE102Power Line Conducted Emission
Test harness	Positive power cord and power return	Equipment power cord including return line
Test frequency	0.15MHz~108MHz	10kHz~10 MHz
Limits	According to the different frequency range, the segmentation limit is divided into Level 1 ~ Level 5 according to different grades.	Different limits are selected depending on the rated voltage of the EUT.
Main test equipment	Receiver, impedance stabilization network, etc.	Receiver, impedance stabilization network, 20dB attenuator, etc.
Detection mode	PK、QP、AV	PK

Difference between 2.3 GB/T 18655 radiation disturbance and GJB 151B-2013 RE102

Table 5

Test Items	GB/T 18655 Radiated disturbance of components/modules	GJB 151B-2013 RE102electric field radiation emission
Test frequency	0.15MHz~2.5 GHz	10kHz~18 GHz
Limits	According to the different frequency range, the segmentation limit is divided into Level 1 ~ Level 5 according to different grades.	According to different platforms, it is suitable for submarines, surface ships, aircraft and space systems, ground and other different limits.
Main test equipment	Receivers, rod antennas, biconical antennas, log-periodic antennas, horn antennas, etc.	Receiver, rod antenna, double cone antenna, double ridged horn antenna, etc.
Detection mode	PK、QP、AV	PK
antenna polarization direction	30MHzThe following use rod antenna: vertical polarization 30MHzAbove: horizontal polarization, vertical polarization	30MHzThe following use rod antenna: vertical polarization 30MHzAbove: horizontal polarization, vertical polarization

Differences between 2.4 ISO 11452-4 High Current Injection (BCI) and GJB 151B-2013 CS114

Table 6

Test Items	ISO 11452-4 High current injection method (BCI)	GJB 151B-2013 CS 114Conduction sensitivity of cable bundle injection
Test frequency	1MHz~400 MHz	4kHz~400 MHz
Test Method	closed-loop method, substitution method	closed-loop method
Test position	Closed-loop method: 900mm(± 10mm) from the injection probe to the EUT Alternative: 150±50mm, 450±50mm, 750±50mm distance between injection probe and EUT connector	The monitoring probe is 5cm away from the EUT connector; the injection probe is 5cm away from the monitoring probe
Interference signal type	CW AMModulation; modulation frequency 1kHz, modulation amplitude 80%	PMModulation, modulation frequency 1kHz, duty cycle 50%
Test harness	Power and signal lines	Power and signal lines
Limits	According to different grades are divided into Level 1 ~ Level 4	According to the use of different platforms, divided into 5 limits
Main test equipment	Signal source, power amplifier, directional coupler, injection probe, monitoring probe, LISN, etc.	Signal source, power amplifier, directional coupler, injection probe, monitoring probe, LISN, etc.

Differences between 2.5 ISO 11452-8 Magnetic Field Immunity and GJB 151B-2013 RS101

Table 7

Test Items	ISO 11452-8 Magnetic field immunity	GJB 151B-2013 RS 101magnetic field radiation sensitivity
Test frequency	25Hz~150 kHz	25Hz~100 kHz
Test Method	Alternative law	closed-loop method
Limits	According to different grades are divided into Level 1 ~ Level 4	Divided into two limits for Army and Navy platforms
Main test equipment	Signal source, 20-turn radiating loop antenna with a diameter of 12cm or AC Helmholtz coil, current probe, etc.	Signal source, 12cm diameter 20-turn radiating loop antenna or AC Helmholtz coil, current probe, LISN, etc.

Differences between 2.6 ISO 11452-2 Radiated Immunity-ALSE Method and GJB 151B-2013 RS103

Test environment: anechoic chamber

Table 8

Test Items	ISO 11452-2Radiated Immunity	GJB 151B-2013 RS 103electric field radiation sensitivity
Test frequency	80 MHz~18 GHz	10 kHz~40 GHz
Test Method	Alternative law	closed-loop method
Interference signal type	ISO 11452-1:2015 80 MHz~800MHz: CW, AM modulation (modulation frequency 1kHz, modulation amplitude 80%) 800 MHz ~ 1.2 GHz & 1.4 GHz ~ 2.7 GHz: CWPM1 modulation (pulse width of 577us, cycle of 4600us) 1.2 GHz ~ 1.4 GHz & 2.7 GHz ~ 18 GHz: CWPM2 modulation (pulse width of 3us, cycle 3333us)	PMModulation: modulation frequency 1kHz, duty cycle 50%
Test position	1GHzFollowing: The antenna reference point is aligned with the center of the harness. 1GHzAbove: antenna reference point aligned with EUT	200MHzthe following: test the centerline of the configuration boundary edge 200MHz~1GHz: The overall width of the EUT housing and the first 35cm segment of the termination cable are within the 3dB lobe width of the antenna 1GHzAbove: the overall width of the UT housing and the first 7cm segment of the termination cable are both within the 3dB lobe width of the antenna
antenna polarization	Vertical polarization: 80MHz ~ 18 GHz: Horizontal polarization: 400MHz ~ 18GHz	30MHzfollowing: vertical polarization 30MHzAbove: vertical polarization, horizontal polarization
Limits	recommend grade 25 V/m ~ 100 V/m	5V/m~200V/mAccording to different platforms and test band selection
Main test equipment	Signal source, power amplifier, transmitting antenna, receiving antenna, field strength probe, power meter, directional coupler, attenuator, etc.	Signal source, power amplifier, transmitting antenna, receiving antenna, field strength probe, power meter, directional coupler, attenuator, LISN, etc.

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