page_title: Line Impedance Stabilization Network
hierarchical_section_title: Line Impedance Stabilization Network
caption_attribution_description: block diagram LISN
context_page_description: A line impedance stabilization network is a device used in conducted and radiated radio-frequency emission and susceptibility tests, as specified in various electromagnetic compatibility /EMI test standards
  A LISN is a low-pass filter typically placed between an AC or DC power source and the EUT to create a known impedance and to provide a radio frequency noise measurement port. It also isolates the unwanted RF signals from the power source. In addition, LISNs can be used to predict conducted emission for diagnostic and pre-compliance testing.
context_section_description: A line impedance stabilization network (LISN) is a device used in conducted and radiated radio-frequency emission and susceptibility tests, as specified in various electromagnetic compatibility (EMC)/EMI test standards (e.g., by CISPR, International Electrotechnical Commission, CENELEC, U.S. Federal Communications Commission, MIL-STD)
  A LISN is a low-pass filter typically placed between an AC or DC power source and the EUT (equipment under test) to create a known impedance and to provide a radio frequency (RF) noise measurement port. It also isolates the unwanted RF signals from the power source. In addition, LISNs can be used to predict conducted emission for diagnostic and pre-compliance testing.
caption: LISN block diagram. This is standard diagram of a typical LISN. Part values for a particular standard (MIL-STD 461E): C1=8μF, R1=5Ω, C2=250nF, R2=1kΩ