TekBox LISN Series Line Impedance Stabilization Networks - Overview

Frequently Asked Questions:

Question: What is a LISN and what is it used for?

Answer: LISN is the abbreviation for Line Impedance Stabilization Network (also called AMN/Artificial Mains Network). These are low-pass filters that are usually connected between the DC/AC source and the DUT (device under test). The LISN simulates supply networks (low-voltage network, on-board network of a motor vehicle, aircraft, etc., telecommunications network). LISN are used for both line-based and radio-based EMC (electromagnetic compatibility) tests, which are specified in various standards (e.g. CISPR, CENELEC, MIL-STD, etc.). The tasks of a LISN include the suppression of RF interference that may be present on the supplying network. It also provides a normalized impedance on the line voltage side for the DUT. The LISN also provides a defined connection between the DUT, the supply network and the measuring device: For further measurement and analysis, e.g. with a spectrum analyzer, the LISN ensures the decoupling of RF interference voltage that is superimposed on the supplying mains voltage of the DUT. [Source: Wikipedia]