LISN stands for 'Line Impedance Stabilization Network'. Com-Power offers a line of LISNs developed for conducted emission testing according to the most commonly adopted EMC specifications like CISPR, FCC, ISO, EN, RTCA DO-160 and MIL-STD 461D.
The LISN circuit is designed and constructed to meet the performance criteria given by these standards.
A LISN, or as it is also known, Artificial Mains Network (AMN), as a function of its design, performs the following functions:
Provides a defined, stable, impedance to the Equipment Under Test (EUT) Isolates the EUT from the power distribution network (or power source); thereby minimizing potential affects of external influences on the measurements, and facilitating accurate and repeatable results.
Provides a near 1:1 (<0.5 dB insertion loss) 50O coaxial measurement port (type-N) for connection to a spectrum analyzer or EMI receiver.
Use of a Transient Limiter for impedance matching, reduction of out-of-band emissions and transient protection for your measurement instrument is highly recommended and available from Com-Power.
Com-Power carries a variety of Three-Phase LISNs for CISPR 16-1-2/ANSI C63.4 of current ratings from 16 to 100 Amps. The line under test can be selected using a manual/mechanical switch or a fiber optic controlled remote interface. All Com-Power LISNs are individually calibrated in compliance with the relevant standards. Impedance, Phase, Isolation, and Insertion Loss data is supplied with each unit, along with the calibration certificate.