EM Test CWS500 D
User manual V 1.07 26 / 34
6.5. CDN Coupling/ Decoupling Network
The CDN’s are connected externally to the output of the simulator or the
6dB-attenuator. The coupling network is used to couple the disturbance
signal to the lines of the equipment under test. The coupling is
accomplished with capacitors or resistors having a sufficient bandwidth
according to IEC 61000-4-6.
The components, such as the common mode impedance and the
coupling factor are specified within the standard. Fig 6.5 : CDN M5
Fig 6.6 : Typical Impedance Zce of a CDN Fig 6.7 : Typical Coupling factor of a CDN
Examples of a single shielded line (S1) and a 3-line power supply (M3) are shown below.
Fig 6.8 : CDN S1 Fig 6.9 : CDN M3
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