Overview
The Schwarzbeck NPLC 8500 is a Line Impedance Stabilization Network (LISN) designed for power line communication (PLC) measurements in accordance with ITU-T G.9901. It enables accurate measurement of asymmetrical disturbance voltages between a conductor and ground within the frequency range of 3 kHz to 148.5 kHz.
The LISN is connected between the mains supply and the equipment under test (EUT), providing a defined impedance while allowing conducted disturbances to be measured via a 50 Ω BNC output. Its design ensures stable and repeatable test conditions, making it well-suited for PLC measurement environments.
The EMC Shop customers use the Schwarzbeck NPLC 8500 to measure conducted disturbance voltages in PLC systems under controlled conditions. The LISN is installed between the mains supply and the EUT, where it stabilizes the line impedance and isolates external noise.
In a typical setup, the EUT is connected to the front panel terminals, while the mains supply is connected at the rear. Disturbance signals are routed to the BNC output (50 Ω), where a spectrum analyzer or EMI receiver is used for measurement and analysis.
This configuration allows engineers to evaluate low-frequency conducted disturbances, supporting testing, troubleshooting, and validation of PLC systems in compliance with ITU-T G.9901.
