Editing Electromagnetic compatibility (section)

===Types of interference===
EMC is often understood as the control of electromagnetic interference (EMI). Electromagnetic interference divides into several categories according to the source and signal characteristics.

The origin of interference, often called "noise" in this context, can be man-made (artificial) or natural.

Continuous, or continuous wave (CW), interference comprises a given range of frequencies. This type is naturally divided into sub-categories according to frequency range, and as a whole is sometimes referred to as "DC to daylight". One common classification is into [[narrowband]] and [[broadband]], according to the spread of the [[Spectral band|frequency range]].

An [[electromagnetic pulse]] (EMP), sometimes called a [[Transient (oscillation)|transient]] disturbance, is a short-duration pulse of energy. This energy is usually broadband by nature, although it often excites a relatively narrow-band ''[[damped sine wave]]'' response in the victim. Pulse signals divide broadly into isolated and repetitive events.