Isolate the power and data lines to your DUT (device under test) to eliminate outside and unknown electrical noises, providing a stable impedance during your testing. Line impedance stabilization networks (LISN's) are used for electromagnetic compliance testing as well as engineering labs for better performance and more accurate measurements.
Rent Com-Power LI-3P-132 150kHz to 30MHz Three-Phase Line Impedance Stabilization Network
SKU: 11124