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What is EMC?

Electromagnetic compatibility (EMC) is the interaction of electromagnetic energy generated by electronic equipment and the surrounding environment. The two main methods of classifying these interactions is through Emissions and Immunity.

What are Emissions?
Emissions are the generated electromagnetic energy that is released into the environment and produced by a device or other source.

What is Immunity?
Immunity and Susceptibility are used interchangeably and can be defined as the interference of electromagnetic energy in the surrounding environment on a device and the tendency of this electromagnetic energy to inhibit proper device functionality.

Why perform EMC testing?
EMC testing is performed to ensure that devices are designed and specified to function in electromagnetic environments they will commonly be exposed. Testing verifies that a device will function in the presence of electromagnetic interference (EMI), the device will not radiate unacceptable levels of electromagnetic energy, and that a device will not disrupt the function of other nearby electronic devices. A typical testing program consists of various emissions and immunity requirements. A few examples include electrostatic discharge testing, surge testing, and possible on-site evaluations.