Coupling Decoupling Network

Shieldingshop offers a variety of Com-Power designed Coupling/Decoupling Networks (CDN’s). These devices are built to be used for RF conducted immunity tests in accordance with IEC 61000-4-6.

This standard describes a consistent method for assessing the immunity of equipment or a system against a defined phenomenon. Since the last published edition in 2008, the use of CDN’s has been included in the standard.

IEC 61000-4-6 defines the different functions of a CDN as follows:

Coupling Network: electrical circuit for transferring energy from one circuit to another with a defined impedance.

Decoupling Network: electrical circuit for preventing test signals applied to the equipment under test (EUT) from affecting other devices, equipment, or systems that are not under test.

Because a CDN must be connected in series with the line(s) under test, Com-Power designed four different models. Each of these is designed for a specific type of power or I/O interface. For more detailed information, please refer to the table below or the specific product pages.

Listing of Coupling Decoupling Network (CDN) series

Series Description Application
M - Series Power Lines
Power Supply Cables 
One to Five Power Conductors
Telecom Series Unscreened Balanced Lines
Unshielded Twisted Pair 
One, Two or Four Pair
Screened Series Screened Lines
Shielded Lines 
Unbalanced Multi-Conductor, USB, Coaxial,
Balanced Pairs (telecom)
Audio Frequency Series Unscreened Unbalanced Lines
Unshielded Unbalanced Cables  
Two, Four or Eight Wires
Coupling Decoupling Network
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