Abstract
This paper presents the correction for free space (FS) with respect to open area test site (OATS) radiated emission data. This correction is applicable to levels measured in a complete absorber lined chamber (CALC) in order to compare these levels with legislative requirements, which are based on OATS measurements. The correction is also applicable to theoretical radiated emission data in order to compare these data with OATS measurement data. Only the influence of the ray paths on the site attenuation (SA) as obtained on an OATS and in a CALC is given. The effects of the antenna patterns, antenna mismatch, influence of metal on the antenna and near field effects are not treated. The correction for a small source located 1 m above the ground plane is given as an example. It is used to compare a practical CALC with an OATS via the site attenuation. A Pascal program used to calculate the correction for any setup is given.
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