Radiocommunications Assignment and Licensing Instruction (RALI) FX3 Microwave Fixed Services Frequency Coordination provides details the channel arrangements and assignment instructions for each microwave frequency band and the regulatory rules for system planning relevant to frequency coordination, in addition to other general information helpful to these processes. The RALI and its attachments have been developed primarily for the ACMA and accredited frequency assigners to optimize use of the spectrum for microwave fixed services it is also a useful guide for microwave system planners.
The ACMA collects statistical information on the microwave fixed point-to-point bands to help in the analysis of these bands. These statistics provide are available in the spectrum engineering technical library.
In July 1998, the former ACA completed a comprehensive review of the RALI. The review process concluded with an industry consultation period, comments from which contributed to the significant content and editorial changes to the RALI. A number of issues that were raised during the review were identified as requiring further work.
In April 2004, the former ACA introduced a simpler method of assessing antenna compliance. This method allows compliance to be determined by reference to the antenna front-to-back (F/B) ratio and antenna cross polar discrimination (XPD) as stated by the respective product manufacturer. The provision of antenna radiation envelope (RPE) data to the former ACA became a requirement for new assignments under these arrangements. The microwave fixed service antenna RPE index page provides information on which microwave parabolic antennas the ACMA already holds RPE data. This information is intended to assist the ACMA and accredited frequency assigners to easily determine whether RPE data needs to be submitted with a proposed new assignment.