Electromagnetic Interference Definition

Electromagnetic interference — is an unwanted influence of electromagnetic fields created by energy and electromechanical equipment, power lines of high voltage, and industrial electric transport. The closer to the telecommunication equipment, the stronger their influence is.

As known, very arbitrarily and randomly distributed in space are the sources of electromagnetic radiation. The signals from the conductors spread interference have a low frequency signal-up to 1.-.5 mHz.

The latter has great energy because of their quite large summation period and may cause the equipment to fail. If any device is interference-sensitive and reaps power from a network shared by other consumers, then the interference is trasmitted to such device through the power cable (a conductor).

The radiation spreads high-frequency interference signals, which have a low energy. This means it can only cause malfunctions in the device.