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FCC CDNs

Coupling / Decoupling networks for IEC/EN 61000-4-6

  • AF type
  • C type
  • M type
  • S type
  • T type

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EN 61000-4-6 requires that the EUT be tested from 150 kHz to 80 MHz with the capability to test up to 230 MHz. No test levels have been imposed in the 9 kHz to 150 kHz region because of the low probability of causing electronic systems to fail from with either intentional or unintentional radiators.

The specification has three open circuit voltage levels 1, 3, and 10. These levels have been selected because they represent the mid range of radiated fields.

Coupling and Decoupling Networks
The common mode current disturbance signal can be delivered to the EUT using a variety of coupling networks to inject the signal onto the unscreened cables, shielded cables, balanced cables, coaxial cables and power mains.

Decoupling networks are used to insure that the disturbance signal does not influence the auxiliary equipment and are placed between the EUT and the auxiliary equipment. One decouling network is inductive and uses a high impedance choke. The second decoupling network combines resistive and inductive technique by using ferrite toroids that are placed around the cables connecting the EUT and the auxiliary equipment. These coupling and decouling networks can be separate or combined in the same instrument

Product Common Mode Impedance at EUT Con Decoupling Attenuation Generator Disturbance Coupling Circuit EUT/AE Port I/O Connections Insertion Loss EUT/AE Voltage Attenuation Generator/EU
Series AF 150 kHz – 26 MHz: 150+20ohm 26MHz – 80MHz: 150+60/-45ohm 80MHz – 230MHz: 150+60/-60ohm Contact Accelonix for datasheet Freq: 150kHz – 230MHz Connector: 50ohmBNC RF Voltage: AC Voltage: Audio Socket, D-Sub series, Multi-Contact, Safety Socket 30dB at 150 kHz >20dB at 230 MHz 10dB+1dB/-3dB
SERIES C 150 kHz – 26 MHz: 150+20Ω, 26MHz – 80MHz: 150+60/-45Ω, 80MHz – 230MHz: 150+60/-60Ω Contact Accelonix for datasheet Connector: 50ΩBNC, Freq: 150kHz – 230MHz, RF Voltage: ≤ 30V AC Voltage:, Current: 1 Ampere, DC Voltage: BNC, Type-N <1dB at 230MHz 10dB+1dB
Series M 150 kHz – 26 MHz: 150+20ohm 26MHz – 80MHz: 150+60/-45ohm 80MHz – 230MHz: 150+60/-60ohm Contact Accelonix for datasheet Freq: 150kHz – 230MHz Connector: 50ohmBNC RF Voltage: AC Voltage: Multi-Contact Safety Sockets <0.1dB up to 400 MHz 45dB at 150 kHz 10dB+1dB/-3dB
Series S 150 kHz – 26 MHz: 150+20ohm 26MHz – 80MHz: 150+60/-45ohm 80MHz – 230MHz: 150+60/-60ohm Contact Accelonix for datasheet Freq: 150kHz – 230MHz Connector: 50ohmBNC RF Voltage: AC Voltage: D-Sub min, S2 to S50, USB <3dB up to 20KHz <10dB at 1 MHz <20dB up to 10MHz 10dB+1dB/-3dB
Series T 150 kHz – 26 MHz: 150+20ohm 26MHz – 80MHz: 150+60/-45ohm 80MHz – 230MHz: 150+60/-60ohm Contact Accelonix for datasheet Freq: 150kHz – 230MHz Connector: 50ohmBNC RF Voltage: AC Voltage: 100V Current: 400 milliamperes RJ 11, RJ 45 <3dB at 100 MHz 10dB+1dB/-3dB