Coupling Networks & LISN
Coupling Networks & LISN
Coupling networks and Line Impedance Stabilization Networks (LISNs) are essential accessories for conducted electromagnetic compatibility (EMC) testing. A LISN — also called an Artificial Mains Network (AMN) — provides a defined RF impedance at the power supply port of the equipment under test (EUT), isolates the EUT from supply network interference, and extracts conducted RF emissions for measurement per CISPR 16-1-2. Coupling Decoupling Networks (CDNs) serve a complementary role in conducted immunity testing per IEC 61000-4-6: they inject RF test signals onto signal, control, and power lines while preventing test energy from reaching auxiliary equipment.
These devices are fundamental in both accredited compliance laboratories and in-house pre-compliance labs for demonstrating conformity to regulatory frameworks such as CE marking (EN 55032, EN 55011), FCC Part 15, and military MIL-STD-461. They are routinely used in electronics manufacturing, telecommunications, automotive, industrial automation, and medical device industries.
Typical Applications
- Conducted RF emissions measurements on single-phase and three-phase AC mains per CISPR 22, CISPR 32, and EN 55032
- Conducted immunity testing on signal and control lines per IEC 61000-4-6 using CDNs
- Pre-compliance EMC testing in R&D and product development laboratories
- Automotive EMC testing on 12 V and 24 V DC supply lines per CISPR 25 and ISO 7637
- Military and aerospace conducted susceptibility testing per MIL-STD-461F/G and DO-160
Popular Brands
Rohde & Schwarz manufactures precision V-networks and AMNs widely deployed in accredited EMC test facilities. Com-Power offers a broad range of CDNs and LISNs covering single-phase, multi-phase, and telecom port configurations. Other notable manufacturers include Schwarzbeck, EM Test, and Fischer Custom Communications.
