EMI/EMC compliance testing is essential for ensuring that electronic devices operate without causing interference with other equipment. Electromagnetic interference (EMI) measures the emission of unwanted signals, while electromagnetic compatibility (EMC) assesses a device's performance amidst such interference. Various sectors, including industrial, consumer, telecommunications, and medical fields, rely on such testing to meet regulatory standards and improve device reliability.

1. EMI/EMC Compliance Testing
EMI/EMC testing was conducted to analyze the interference and compatibility of a subject to
ensure industry compliance. EMI which is Electromagnetic Interference usually tests for the
emission of any signal or noise from a subject.
It causes interference with other vehicles, equipment, or machinery. EMC, which is
Electromagnetic Compatibility, tests the ability to operate without creating electromagnetic
interference for other devices.
Every manufacturer and consumer product such as electronic devices, medical equipment,
aerospace or military vehicles, and machinery heavily depends on EMI/EMC Testing. All
devices have the potential to cause electromagnetic interference and once the number of
electronic devices increases, there is a potential for interference between the devices.
However, EMI/EMC testing have become a necessity for all product designers who make or
modify products. So, here we will focus more on the following industry’s product testing as
mentioned below:
- Industrial Electronics
- Consumer Electronics
- Telecommunications

2. - Medical
What is Electro Magnetic Compatibility?
Electro Magnetic Compatibility (EMC) is defined as the ability of electronic and
communication equipment to operate satisfactorily in the presence of interference. EME is
known as Electromagnetic Emission and EMI is Electromagnetic Immunity.
Difference between EMI/EMC
EMI/EMC are interconnected in so many ways. It is often also assumed to be the same when
referring to the regulatory testing of electronic consumer goods and components. Now, let’s
understand both terms individually and how they are different.
Electro Magnetic Immunity (EMI) – It is electromagnetic energy that affects the components
and functioning of an electronic device. Its interferences can occur naturally or be caused by
another electrical device.
Electro Magnetic Compatibility (EMC) – It is used to measure the ability of a device to
operate as expected in its shared operating environment. However, at the same time, it is not
being affected by and not affecting the functioning of other equipment present within the same
environment.
Apart from this, examining the reaction of the device when it gets exposed to electromagnetic
energy is one part known as Immunity or Susceptibility Testing. The other components of
Emission Product Testing Services measure the exact amount of EMI generated by the
internal electrical system.
EMI results from a magnetic or electric field acting on a device and thus causing it to
malfunction and it is impossible for electronics to operate in isolation. As they are engineered
to function in the presence of some amount of EMI. A device's EMC rating indicates how well
a device can function in its environment without creating any unwanted effects on the
surrounding equipment.
List of EMI/EMC tests
1. RTCA-DO-160
2. MIL-STD-461
3. Radiated Emission
4. Electromagnetic Coupling
5. Fast Transient and burst
6. H-Fields
7. Conducted Emissions
8. Radiated Immunity
9. Electro Static Discharge
10. Surge
EMC testing confirms that a particular product must follow the standards. So, it divides into:
1. Emission Testing
2. Susceptibility Testing

3. Every organization wants to succeed in EMI/EMC testing. So, to improve your chances of
success, pre-compliance testing is a wise approach.