Com-Power CDN-M325 Coupling/Decoupling Network (CDN)

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Com-Power CDN-M325 units are for testing from 150 kHz - 80 MHz according to the EN 61000-4-6 / IEC 61000-4-6 standard for immunity to conducted disturbance induced by radio frequency fields. As the name implies the CDNs has both coupling and decoupling networks. The coupling network delivers injected RF common mode current disturbance signals through the various conductors to the equipment under test (EUT). The decoupling networks are used insure that the disturbing signals injected on the signal or power line of the EUT by the coupling networks does not interfere with any the auxiliary equipment (AE) connected to the EUT. Each CDN contains integrated direct capacitive coupling along with the high impedance choke for inductive decoupling.

The disturbing signal can be injected on signal lines and power line of an EUT by using the appropriate CDN described below. The CDN setup must be calibrated to establish the drive table. Please use the appropriate calibration components for the CDN.

For each CDN you will need:

  • Calibration adapters
  • 1 unit of the 50 Ω Terminator
  • 2 units of the 150 Ω to 50 Ω adapter
  • Optional Ground plane


M series CDNs for powerline conductors

The M series CDNs are for injecting common mode current disturbance on to the powerline conductor of the equipment under test. The CDN to be used is determined by the number of wires in the conductor. The standard M series CDNs have a current rating of 25 Amps.

# wires in the cable 3
Coupling Point Each wire
Application Single Phase + Netural +Earth