Introduction：

This article introduces the CDN and CDNE are defined and used by the EMC electromagnetic compatibility testing industry test standard CISPR15, this article introduces the CDN and CDNE by the name, purpose, voltage division coefficient common-mode impedance and other aspects of a detailed description of the difference between the CDN and CDNE, to facilitate the correct choice of test equipment for EMC laboratories. Special attention is paid to the CDN mentioned here is not the network industry's content distribution network gas pedal, this paper introduces the CDN and CDNE are EMC test equipment, dedicated to EMC testers on lamps and other similar equipment products for radiation testing.

The names are different:

    • CDNE full name: Coupling/Decoupling Network for Emission: Coupling and Decoupling Network for Emission
  • CDN full name: Coupling/Decoupling Network: coupling decoupling network

Uses vary:

CDN: Coupling decoupling network uses:

CDN is used for signal coupling or decoupling. Most commonly used in EMC (Electromagnetic Compatibility) conducted immunity test, power supply to the equipment and auxiliary equipment, to isolate the grid noise, while coupling the interference signal to the purpose of the equipment.CISPR15 old standard is also used in the CDN, referenced to the rain IEC61000-4-6 conducted immunity standard, so the CDN can be done to do the radiation, but also to do in line with the IEC61000-4-6 conducted immunity. conducted immunity.

CDNE: Coupled decoupling network (emission) usage:

CDNE is generally used in IEC 61000-4-6 and GB17743, CISPR15, EN55015 standards to test the radiation substitution method test at 30MHz-300MHz. The program can be used to test the radiated emission test of lamps and other similar equipment at 30MHz-300MHz in a general laboratory.CDNE is only applicable to the radiated proxy method test of CISPR15-2018, and cannot be used for immunity test!

The partial pressure coefficients are different:

Different partial pressure coefficients will result in different test results, see the table of technical parameters of the product for details, this parameter only has an effect on the test results.

View technical specifications for CDN coupling decoupling network equipment

View technical specifications for CDNE coupled decoupled network transmitter equipment

The common mode impedance is different:

Common mode impedance of CDNE:

150Ω+10Ω/ -20Ω

Common mode impedance of the CDN:

  • 150 kHz - 24 MHz: 150Ω±20Ω
  • 24 MHz-80 MHz: 150Ω+60Ω/-45Ω
  • 80 MHz - 230 MHz: 150Ω±60Ω

CDNs and CDNEs are tested and used differently:

See details:Technical parameter requirements of CDNE and CDNE test methods

Shenzhen EUTTEST Technology Co.,Ltd., Ltd. provides CDNE test accessories in accordance with the latest version of CISPR15-2018 standard; also provides CDN in accordance with the latest version of the national standard GBT17743-2017, if there is a need to click on the contact us to get in touch with us.