Electromagnetic Interference Requirement (EMI Requirement) refers to a specification or standard that outlines the acceptable levels of electromagnetic interference produced by an electronic device or system, or the immunity of a device or system against external electromagnetic disturbances.
EMI refers to the unwanted disruption caused by the electromagnetic radiation emitted from electronic devices. This interference can interfere with the functioning of other nearby devices or systems, leading to performance issues, data corruption, or even total failure. Therefore, regulatory bodies, such as the Federal Communications Commission (FCC) in the United States, establish EMI requirements to limit these emissions and ensure that electronic devices do not cause harmful interference.
EMI requirements define specific limits on the emissions generated by electronic devices at different frequencies. For example, limits may be set for conducted emissions, which refer to the electrical signals that travel through power lines, or radiated emissions, which refer to the electromagnetic waves that propagate through space. These requirements help manufacturers design and produce electronic devices that meet the specified emission levels.
Additionally, EMI requirements also address the immunity or susceptibility of devices or systems to external electromagnetic interferences. These requirements define the levels of disturbance that a device or system should be able to withstand without experiencing malfunction or degradation in performance. This ensures that electronic devices are not negatively affected by electromagnetic disturbances present in their operating environment.
Electromagnetic interference requirements play a crucial role in ensuring the proper functioning of electronic devices and systems while minimizing the potential detrimental effects of electromagnetic noise and interference. Compliance with these requirements is often a mandatory regulatory requirement for manufacturers, importers, and sellers of electronic devices to ensure electromagnetic compatibility and mitigate interference issues.
