8Purpose

8 Purpose

(1) The purpose of this instrument is to manage interference by providing for the protection of radiocommunications receivers that: (a) are operated under a receiver licence; or (b) receive, or are intended to receive, radiocommunications from radiocommunications transmitters operated under transmitter licences; in or adjacent to the 850/900 MHz band: (c) outside the parts of the spectrum specified in the Radiocommunications (Spectrum Re-allocation – 850/900 MHz Band) Declaration 2020; or (d) outside the named area specified in the Radiocommunications (Spectrum Re-allocation – 850/900 MHz Band) Declaration 2020. (2) This instrument has been made to guide the management of these types of interference to licensed radiocommunications receivers operating in the following circumstances: (a) apparatus licensed trunked land-mobile radiocommunications receivers operating in the following frequency bands (Part 3): (i) 806 MHz to 809 MHz; (ii) 820 MHz to 825 MHz; (iii) 851 MHz to 854 MHz; and (iv) 865 MHz to 870 MHz; (b) apparatus licensed fixed link radiocommunications receivers operating in the frequency band 845 MHz to 851 MHz (Part 4); (c) spectrum licensed base station receivers operating in the 900 MHz band (Part 5); and (d) apparatus licensed aeronautical navigation services operating above 960 MHz (Part 6).

Note: In relation to subparagraphs (2)(a)(ii) and (iv), the ACMA’s policy is for trunked-land mobile services to cease being operated in 820 MHz to 825 MHz, and 865 MHz to 870 MHz, by 1 July 2024. See the ACMA paper, The ACMA’s long-term strategy for the 803-960 MHz band, available, free of charge, on the ACMA’s website: www.acma.gov.au.

(3) Protection criteria and coordination arrangements recommended by these guidelines are specified in RALI FX 22 and RALI LM 8.

Note: RALI FX 22 and RALI LM 8 are available, free of charge, on the ACMA website: www.acma.gov.au.

(4) As radio waves propagate in different ways because of factors such as frequency, terrain, atmospheric conditions and topography, there are several ways to predict path loss. The ITU-R Recommendation P.1144 Guide to the application of the propagation methods of Radiocommunications Study Group 3 provides a guide on the application of various propagation methods developed internationally by the International Telecommunication Union – Radiocommunications Sector (ITU-R). It advises users on the most appropriate methods for particular applications, as well as the limits, required input information, and output for each of these methods. It is recommended that the most recent version of propagation models defined by the ITU-R should be considered when modelling propagation in the 850/900 MHz band.