Title :
Problems with radiated-emission testing at 3 m distance according to CISPR 11 and CISPR 22
Author :
Garn, H.F. ; Zink, E. ; Kremser, R.
Author_Institution :
Austrian Res. Centre Seibersdorf, Austria
Abstract :
The standards CISPR 11 and CISPR 22 specify different extrapolation factors for radiated-emission test data measured at 3-m distance. The authors have experimentally determined extrapolation factors for a personal computer that radiated the signal from a comb generator via its wiring harness and for a battery-powered reference radiator. Results show that factors can vary between -18 dB and -1 dB. It is concluded that, based on the present specifications, compliance tests at 3-m distance should not be allowed
Keywords :
computerised instrumentation; electromagnetic interference; measurement standards; microcomputer applications; 3 m; CISPR 11; CISPR 22; battery-powered reference radiator; comb generator; compliance tests; extrapolation factors; measurement standards; personal computer; radiated-emission test data; wiring harness; Clamps; Electromagnetic compatibility; Electromagnetic measurements; Electromagnetic radiation; Extrapolation; Frequency; Microcomputers; Signal generators; Testing; Wiring;
Conference_Titel :
Electromagnetic Compatibility, 1993. Symposium Record., 1993 IEEE International Symposium on
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-1304-6
DOI :
10.1109/ISEMC.1993.473744
