Site-reference method for EMC test site validation

Electromagnetic compatibility (EMC) compliance testing for the CE-certifica tion of electronic apparatus involves the measurement of radiated-emissions in the frequency range of 30 MHz to 1 GHz. To achieve equivalent test resu lts from different testing laboratories, test sites must be of validated, s tandard performance. This paper suggests two substantial improvements to th e standard site validation procedure: (i) Precise, numerically calculated r eference values of site attenuation for tuned dipoles are given. (ii) The n ew "site-reference method" for site validation is suggested. it avoids the determination of the antenna factors of transmitting and receiving antenna and minimizes uncertainties in the measurement result. This improves the re liability of judgements upon site performance and helps to economize the de sign of test facilities, e.g. anechoic chambers.