7Background

7 Background

(1) The 2 GHz band has been allocated for spectrum licensing in capital cities, and parts of the 2 GHz band (1960 MHz to 1980 MHz, paired with 2150 MHz to 2170 MHz) have been allocated for spectrum licensing in regional areas. Apparatus licensed and class licensed radiocommunications transmitters communicate with radiocommunications receivers in and adjacent to the 2 GHz band. These receivers may suffer interference from unwanted emissions, blocking and intermodulation caused by a radiocommunications transmitter operated under a 2 GHz spectrum licence. (2) This instrument has been made to provide guidance on the management of interference from radiocommunications transmitters operated under a 2 GHz spectrum licence to the following: (a) point to point fixed services operating in and adjacent to the 2 GHz band (Part 3); (b) MSS operating above 1980 MHz or above 2170 MHz, adjacent to the 2 GHz band (Part 4); (c) radiocommunications to or from a space object authorised by apparatus licences in the 2025 MHz to 2120 MHz and 2200 MHz to 2300 MHz frequency bands (Part 5); (d) TOB services authorised by apparatus licences in the 1980 MHz to 2110 MHz and 2170 MHz to 2300 MHz frequency bands (Part 6); (e) mobile services provided by radiocommunications transmitters authorised under PTS apparatus licences operating in the 2 GHz band in regional and remote areas, or on board aircraft (Part 7); (f) radiocommunications devices operating under a class licence in and adjacent to the 2 GHz band (Part 8). (3) As radio waves propagate in different ways because of factors such as frequency, terrain, atmospheric conditions and topography, there are a number of ways to predict path loss. The ITU-R Recommendation P.1114 “Guide to the application of the propagation methods of Radiocommunication Study Group 3” provides a guide on the application of various propagation methods developed by the Radiocommunication Sector of the International Telecommunication Union. It advises on the most appropriate methods for particular applications, as well as the limits, required input information and output for each of these methods. The most recent version of propagation models developed by the Radiocommunication Sector of the International Telecommunication Union should be considered when modelling propagation in the 2 GHz band.

Note 1: ITU-R Recommendation P.1114 is available, free of charge, from the International Telecommunication Union’s website at www.itu.int.

Note 2: The use of other published propagation models applicable to the 2 GHz band may also be suitable.

(4) The ACMA may take this instrument into account in determining whether a radiocommunications transmitter operated under a 2 GHz spectrum licence is causing interference to an apparatus licensed or class licensed radiocommunications receiver operating in circumstances set out in this instrument. (5) This instrument does not prevent a person negotiating and implementing other protection requirements with other persons.