LBA Explores Impact of Proposed AM Detune Rules
FCC Docket MM93-177 sets out to adjust FCC rules regarding the adjustment and measurement of AM directional antenna arrays. It also seeks to modify the manner in which the reradiation impact of nearby structures is considered. Today, all towers within a fixed distance of AM antenna systems must be evaluated. Under the new proposals, only those structures exceeding a three-dimensional test must be considered. The test consists of a frequency dependent height, along with a frequency dependent spacing distance. These limits are different for directional and non-directional antenna systems.