L. Dunker / BNetzA/413a1 Measurement of mains decoupling and/or mains coupling loss - running discussion in CISPR/A Conducting coupling Discussion in CISPR/A/WG2 and CISPR/H/WG2 Concept of the mains decoupling factor Concept of the mains coupling loss Content of to be drafted CD Action in CISPR/A/WG2

L. Dunker / BNetzA/413a2 Conducting coupling

L. Dunker / BNetzA/413a3 CISPR Report 31: Mains decoupling factor /1967

L. Dunker / BNetzA/413a4 CISPR/A(Sec)67/1985

L. Dunker / BNetzA/413a5 CISPR/A(Sec)67/1985

L. Dunker / BNetzA/413a6 Conducting coupling: Measurement procedure

L. Dunker / BNetzA/413a7 Conducting coupling: Measurement procedure Symmerical feeding Radio dummy

L. Dunker / BNetzA/413a8 Result of CISPR/H/WG2 and CISPR/A/WG2 meeting in Cape Town A concept (CISPR/A/WG2(Battermann/ Dunker) for for the estimation the conducting coupling by the AC-mains was presented in CISPR/H/WG2 and CISPR/A/WG2 This concept of the conducting coupling takes into account the characteristics of the AC-mains which have different attenuation for symmetrical and asymmetrical disturbance emissions. The concept deviates from the old CISPR/A/Sec)67; July 1985 CISPR/H/WG2 is interested in this measurement procedure and its results for the weighting of limit on mains CISPR/A/WG2 decided to prepare a draft CD for the measurement equipment and the measurement procedure and to involve CISPR/WG3 in this topic

L. Dunker / BNetzA/413a9 Concept of the mains decoupling factor The mains decoupling factor [dB] is defined for the measurement of: U 0 measured on the test site U 1 measured at the antenna’s feed-point

L. Dunker / BNetzA/413a10 Concept of the mains decoupling factor Results of the D M,asym and D M,sym measured in a modern installed flat at 19 sockets (Voltage at 50 Ohm)

L. Dunker / BNetzA/413a11 Concept of the “coupling loss” The coupling loss of the mains [dB] is the transfer function between two point in a network without constant impedance which can be measured by the disturbance current. The coupling loss is defined as:

L. Dunker / BNetzA/413a12 Concept of the “coupling loss” Results of the C L,M,asym and C L,M,sym measured in a modern installed flat at 19 sockets

L. Dunker / BNetzA/413a13 Content of to be drafted CD Definitions and characteristic of conducted coupling: Definitions of mains decoupling Definitions of coupling loss Estimation of maximal allowed disturbance voltage Requirements to the artificial disturbance source Output voltage (symmetrical and asymmetrical) Impedances (symmetrical and asymmetrical) Conditions for the connection to PE (Battery powered or mains powered) Requirement to the “coupling device”

L. Dunker / BNetzA/413a14 Content of to be drafted CD Requirement to the radio dummy Size and type of the radio case and stick antenna Input impedance to the dummy connected with the stick antenna (impedance converter of CISPR 25) Mains connection from dummy case (capacitive) Powered by battery Indication of voltage at the feed-point of the stick antenna (battery powered receiver or spectrum ananlyzer) Conditions for the connection to PE

L. Dunker / BNetzA/413a15 Content of to be drafted CD Measurement procedure Measurement on the test site (asymmetrical and symmetrical voltage) Handling of disturbance source and radio dummy (e. g. distance to the environment,…) Measurement of the voltage at the antenna feet-point (mains decoupling) or the currents (coupling loss) Calculate the wanted values: mains decoupling or coupling loss by mean and standard deviation Estimation of the symmetrical decoupling of the mains taking into account mean, standard deviation and the t-quantile

L. Dunker / BNetzA/413a16 Action in CISPR/A/WG2 Discussion of the draft CD during the midterm meeting in Frankfurt and decision for further actions It is expected that the CD is basically accepted and this CD is published short after the meeting. The next discussion in CISPR/A could be at the meeting in Sweden. Any comments / cooperation from / with CISPR/I/WG3 are / is welcome.