Pseudo power grid

A device used to measure harmonics and other noise generated by a power circuit on the power supply side. Also known as LISN (Line Impedance Stabilization Network). During noise measurement, the power circuit and load are connected via a simulated power supply network to the outlet. Noise is output as noise terminal voltage from the simulated power supply network. There are two types of noise terminal voltage: normal mode, which measures noise occurring between input lines, and common mode, which measures noise occurring between input lines and ground.