The Schwarzbeck NSLK8163 network replica has the task of supplying the device under test with the operating current, forwarding the interference voltage at its terminals to the radio interference measuring receiver and loading the radio frequency emitted by the device under test with a standardized impedance. The NSLK 8163 is equipped with a 250 μH pre-choke as well as a 50 μH main choke connected in series for each path. The pre-choke ensures excellent decoupling from the feed network, even at 9 kHz.
V network simulations of the NSLK series are required for interference voltage measurements according to VDE, CISPR and related standards. They supply the test object with mains voltage, reduce external interference voltages present in the mains and offer the test object a standardized impedance of 50 Ω || (50 μH + 5 Ω). The interference voltage present at the terminals of the device under test is fed to the radio interference measuring receiver via a high-pass filter with a 7 kHz cut-off frequency (for attenuation of low-frequency interference and mains harmonic components).