7. Semi Anechoic Chamber Information
19
General Information
Dimension : 20m(L) x 12m(W) x 8.5m(H)
Frequency Range : 30MHz ~ 18GHz
Site Attenuation (ANSI C63.4), NSA less than ±4dB
Site Attenuation (CISPR 13), CSA less than ±3dB
Site Validation (CISPR 16-1-4), SVSWR less than 6dB
Test Distance : 3m & 10m
Test Items
Radiated Emission
Conducted Emission
Standards
ANSI C63.4
CISPR 13
CISPR 16-1-4
Cost
USD 1.7 million(about)
12. EMS RS Chamber General Information
24
Cost
USD 430 thousand(about)
General Information
Test Items Standards
Dimension : 9m(L) x 6m(W) x 6m(H)
Frequency Range : 26MHz ~ 18GHz
Field Uniformity (IEC 61000-4-3)
: (0 ~ 6)dB, over 75% of a surface
Polarization : Vertical & Horizontal
Uniformity Plane : 1.5m x 1.5m
Height of the antenna : 1.55m
Test Distance : 3m
Radiated Susceptibility IEC 61000-4-3
14. Typical Shield Rooms Information
26
Cost
USD 260 thousand(about)
General Information
Test Items Standards
Dimension : 10m(L) x 7.5m(W) x 3m(H)
Frequency Range : 14kHz ~ 18GHz
Shielding Effectiveness (IEEE 299)
: more than (60 ~ 100)dB
Measurement Point : Door, Filter, Ceiling, walls, and ventilator
Conducted Emission
Disturbance Power
ESD/EFT/Surge etc.
CISPR 14-1/13/22 etc.
17. OATS Information
29
General Information
Frequency Range : 30MHz ~ 1GHz
Site Attenuation (ANSI C63.4), NSA less than ±4dB
Test Distance : 3m, 10m & 30m
Test Items
Radiated Emission
Standards
ANSI C63.4
Cost
USD 86 thousand(about)
18. EMC Testing Instruments
30
EMI test Receiver
Oscilloscope
Spectrum Analyzer
Signal Generator
Network Analyzer
ESD Generator
EFT/Surge Generator
Above equipments are the most commonly used available for performing EMC measurements.
LISN
Antenna
20. Test for Radiated Emission(RE)
• RE Test for EUT
• Frequency Range : 30MHz to 1GHz(Up to 18GHz)
• Standard : CISPR 11, 12, 13, 25, 22… (EN 550XX)
EEC 95/54, SAE J 1113-41
• Major Testing System (Refer to CISPR 16)
– Test Facility : OATS, ALSE, FAR, SAR
Open area test site or alternate test (anechoic chamber)
– Test Equipment : EMI Receiver(Field strength meter with quasi-peak
detector or EMI test receiver), Spectrum Analyzer
– Test Antenna : Loop, Dipole, Log-periodic, Bi-conical Horn (depending
on Frequency & Regulation)
– Other : Turntable, Antenna Master, etc.
32
22. Test for Conducted Emission(CE)
• CE Measurement emitting from cable of EUT
• Frequency Range : 150kHz to 30MHz
• Standards : CISPR 11, 13, 14, 15, 25, 22.. (EN 550XX)
• Testing System (Refer to CISPR 16)
– Test Facility : Shielded Room or adequate ground planes
– Test Equipment : EMI Receiver, Spectrum Analyzer(Quasi-peak Average
detector available)
– Other : LISN, etc.
* LISN (Line Impedance Stabilization Network) :
to create a known impedance on power lines of electrical equipment
during electromagnetic interference testing. A LISN is typically designed to
allow for measurements of the electromagnetic interference existing on
the power line.
34
23. Limit of CE
35
Conducted Disturbance
at the Mains Ports
* Decreasing Linearly with the Logarithm of the Frequency
- The lower limit shall apply at the transition frequencies.
- Telecommunication Ports 에 대한 Limit 는 고려중임.
0.15 ~ 0.5
0.5 ~ 5
5 ~ 30
79
73
73
66
60
60
Frequency
Range
MHz
Class A
Limits dB (uV)
Q.P Average
Class B
Limits dB (uV)
Q.P Average
66 ~ 56 *
56
60
56 ~ 46
46
50
Table 1 , 2
44
48
52
56
60
64
68
72
76
80
0.1 1 10 100
Disturbance Voltage Injected
into the Mains
Calss A (Q.P)
300.5 5
Calss A (Average)
Calss B (Q.P)
Calss B (Average)
79
73
66
46
50
dBuV
MHz
24. Test for Radiated Susceptibility(RS)
• Radiated field susceptibility testing typically involves a high-
powered source of RF or EM pulse energy and a radiating
antenna to direct the energy at the potential victim or
device under test (DUT).
• Frequency Range : 80 MHz to 1000 MHz
• Test condition : 1-30 V/m (1 kHz CW, 80% AM) , 100 V/m
• Standards : IEC 61000-4-3 (EN 61000-4-3), ISO 11452-2
• Test Facility : FAR
– Test Equipment : Power Amplifier system, Antenna, Field Probe
Sensor, Signal Generator, Directional Coupler, power meter,
– Other : Test software, etc
36
25. Test for Conducted Susceptibility(CS)
• Conducted voltage and current susceptibility testing typically
involves a high-powered signal or pulse generator, and a current
clamp or other type of transformer to inject the test signal
• Frequency Range : 150kHz to 80MHz
• Test Condition : 1-10V (1kHz CW, 80% AM)
• Standards : IEC 61000-4-6 (EN 61000-4-6), ISO 7637
• Test System
– Test Facility : Shield Room
– Test Equipment : Power Amplifier system, Signal Generator,
Directional Coupler, power meter, CDN, Current Clamp
– Other : Test software, etc
37
26. Test for Electrostatic Discharge(ESD)
• ESD is a serious issue in solid state electronics, such as integrated
circuits. Integrated circuits are made from semiconductor materials
such as silicon and insulating materials such as silicon dioxide.
Either of these materials can suffer permanent damage when
subjected to high voltages; as a result, there are now a number of
antistatic devices that help prevent static build up.
• Test Condition(input voltage) : 8kV(Air Discharge), 4kV(Contact
Discharge), Max 25kV
• Standard : IEC 61000-4-2 (EN 61000-4-2), ISO 10605
• Test System
– Test Facility : Shield Room
– Test Equipment : ESD Simulator, Coupling Plane
– Other : Capacitors, Resistors, etc
38
27. ELECTROMAGNETIC COMPATIBILITY
(EMC)
1. Electromagnetic Emissions
Your System Cannot Interfere With Other Systems or
Subsystems in the Vehicle
(e.g., FM Radio).
2. Electromagnetic Susceptibility
Your System Must Continue to Operate Correctly
in the Presence of Interference From Others or
Transient Disturbances.