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.
Schwarzbeck NNBM 8126-A 890 Single Path Airborne Equipment LISN
SKU: sku-1139
PMM L3-32 Four Line 3-Phase LISN w/ V-Network, 32 Amps AC+DC
SKU: 8784