LISNs

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 the potential effects 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.