An analysis of results of testing with existing CDN designs showed the need for closer CDN impedance tolerances. A standard working group was founded for improving the CDN design and for transferring the new emissions measuring equipment requirements to CISPR 16-1-2 and methods to CISPR 16-2-1.
The result describes a specific coupling/decoupling network for emissions (CDNE). In addition to closer tolerances for the asymmetrical impedance, the phase angle, symmetrical impedance and the internal attenuation are also defined.
Teseq’s CDNE series fulfils these new requirements and offers improved reproducibility for current EN 55015 measurements.