Within the shielded compartment for the HV LISNs, a printed
circuit board is applied that allows to vary the input impedance
of the HV LISNs, as shown in Fig. 13(a). This enables the
adjustment of the termination impedance to a variety of distinct
values [19]. As the HV cables used have a characteristic
impedance of ZL = 11 Ω, three termination impedance values
are investigated: ZLISN = 50 Ω according to CISPR 25,
impedance match (ZLISN = 11 Ω), and a purely capacitive termination
ZLISN = 0 Ω. The HV cable harness begins to behave
as a transmission line above a frequency of about ∼2 MHz and
performs an impedance transformation of the termination to the
HV cable’s input impedance ZHVC. A mismatched termination