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).