EMC Testing

Electromagnetic Compatibility (EMC)

With over 30 years of expereince, SK Tech excels in accuracy of EMC test results

· What is EMC?

EMC stands for Electromagnetic Compatibility, and is the ability of an electronic product to work as intended in its environment. That means the product has to limit its own noise (electromagnetic emissions) so that it does not cause interference to other products. Also, the product has to withstand electromagnetic energy from other products without degradation (EMC immunity) in performance.

There are many EMC standards that define the allowable noise levels and required immunity levels. There are many reasons for which EMC is traditionally considered difficult to understand. One reason is that the levels of noise as well as the parameters that affect the levels vary over large range. Another reason is that electromagnetic emissions occur as conducted as well as radiated noise. Then the noise can travel as conducted noise, radiated noise and as combination of the two.

EMC Testing
(Electromagnetic Interference)

Electromagnetic interference (EMI) occurs when electromagnetic energy disrupts the operation of an electronic device. The source of EMI can be man-made, such as other electrical devices like switch-mode power supplies, personal computers, or naturally occurring, such as electrical storms, solar radiation, or even cosmic noises. 

· CE (Conducted Emission)
· RE (Radiated Emission)
(Electromagnetic Susceptibility)

The EMS Test measures whether the broadcasting and communications equipment operates safely and normally when there is electromagnetic interference, in accordance with the technical regulation specified in relevant legislation.

· ESD (Electrostatic Discharge)
· RS (Radiated RF Field Susceptibility )
· EFT/Burst (Electrical Fast Transient/Burst)

· Surge Immunity
· CS (Conducted Susceptibility)
· MF (Magnetic Field)
· Voltage Dips/Interruptions

· Why Do We need EMC Testing?

All electronic devices emit electromagnetic fields and thus influence other devices when interconnected or are in close proximity. Just look around at home. TV, Mobile Phones, WiFi routers, electrical power lines, microwave oven may all disturb or be disturbed by each other if not properly designed for EMC (Electromagnetic Compatibility).

Manufacturer is responsible for ensuring that a device is in compliance with the EMC requirements set by authorities in different markets. In Korea product must comply with the KN/KS EMC standards. The KS/KS standards set limits for both emissions (product does not disturb others) and immunity (product can stand interference coming from other devices) where US FCC sets limits only for emissions.

(Electromagnetic Interference)
Conducted Emission (CE)

· Test to confirm that electromagnetic waves radiated from electrical and electronic devices through power lines do not affect the other external devices in the usage environment

· Measurement of electromagnetic waves emitted to outside through power lines connected to the EUT*

Radiated Emission (RE)· Test to confirm that electromagnetic waves radiated from the EUT do not affect the other external devices in the usage environment
(Electromagnetic Susceptibility)

Electrostatic Discharge (ESD)· Test to confirm the EUT's susceptibility to static electricity
Radiated Susceptibility (RS)· Test to confirm the EUT's susceptibility to radiated electromangetic waves in the usage environment
EFT/Burst· Test to confirm the susceptibility of the EUT when a series of fast electrical transients are applied to power supply terminals, control terminals, signal terminals, etc. in the usage environment
· Test to confirm the EUT's susceptibility to surges caused by overvoltage of transient events : switching, lightning strikes, etc.
Conducted Susceptibility (CS)
· Test to confirm EUT's susceptibility from a power source located in the usage environment when intentional radiation of broadcast signals and various radio communication signals are given
Magnetic Field (MF)· Test to confirm the EUT's susceptibility to generated magnetic fields by current sources
Voltage Dips/Interruptions· Test to confirm the abnormalities of the EUT when the voltage recovers within a short period of time after a sudden decrease in voltage.

* EUT : Equipment Under Test

· Target Items

Items Subject to Testing
ParameterApplicable Standards
ICT Devices(IT/AV)
CISPR 22, EN 55022, KS C 9832, FCC PART 15, etc.CISPR 24, EN55024, KS C 9835, GB/T 17618, etc. 
Industrial·Science·Medical(ISM) DevicesCISPR 11, EN 55011, KS C 9811, FCC PART 18, etc. IEC/EN 60601-1-2, KS C IEC 60601-1-2, etc.
Household AppliancesCISPR 14-1, EN 55014-1 KS C 9814-1, J55014, etc. CISPR 14-2, EN 55014-2, KS C 9814-2, GB 4343.2, etc. 
Sound and Television Broadcast Receivers
CISPR 13, EN 55013, FCC PART 15, J55013, etc.
CISPR 20, EN 55020, KS C CISPR20, etc. 
Residential/Commercial EnvironmentIEC/EN 61000-6-3, KS C 9610-6-3, AS/NZS 4251.1, etc. IEC/EN 61000-6-1, IEC/EN 61000-6-1, KS C 9610-1, etc.  
Industrial EnvironmentIEC/EN 61000-6-4, KS C 9610-6-4, AS/NZS 4251.2, etc.
IEC/EN 61000-6-2, IEC/EN 61000-6-2, KS C 9610-2, etc.
Harmonic CurrentsIEC/EN 61000-3-2, C61000-3-2,  AS/NZS 61000.3.2, etc.

OthersContact Us (+82-31-576-2204)

· Main Facilities

Test Items
10 m / 3 m Full Chamber
Radiated Emission/Radiated Susceptibility 
RE: 9 kHz – 26.5 GHz
RS: 80 MHz – 6 GHz
3 m Chamber
Radiated Emission/Radiated Susceptibility
RE: 1 GHz – 26.5 GHz
RS: 80 MHz – 6 GHz
3 m Debugging Chamber
(2 Systems)

Radiated Emission
30 MHz- 1 GHz
EMI Shield room
(2 Systems)

Harmonic / Flicker

EMS Shield room
(2 Systems)

Electrostatic Discharge
Conducted Susceptibility
Voltage Dips/Interruptions

EMS Chamber
Radiated Susceptibility
RS: 80 MHz – 1 GHz