Document ID: chunk:federal_register_of_legislation:F2023C00946:body:0:p4
Version: federal_register_of_legislation:F2023C00946
Segment Type: other
Provision Reference: 
Character Range: 8936–12124

the wanted output signal. Intermodulation products can be generated in-band in the input stages of receivers in the presence of two or more high level signals at the receiver input.

      2.3                       These guidelines have been made for the management of these types of interference to licensed radiocommunications receivers operating in the following circumstances:
            * Point-to-point fixed services operating in and adjacent to the 3.4 GHz band (Part 3 of these guidelines);
            * Fixed satellite service (FSS) Earth receive stations operating in the 3400-4200 MHz band (Part 4 of these guidelines);
            * Broadband wireless access (BWA) services operating in the 3400-3700 MHz band (Part 5 of these guidelines);
            * Radiolocation services operating in the 3300-3400 MHz and 3400-3600 MHz bands (Part 6 of these guidelines);
            * Class licensed services (Part 7 of these guidelines);
            * Adjacent area spectrum licensed receivers (Part 8 of these guidelines);
            * Earth station protection zones (Part 9 of these guidelines);
            * Earth station facility near Uralla, New South Wales (Part 10 of these guidelines);
            * Adjacent frequency wireless broadband services in the 3400–4000 MHz band (Part 11 of these guidelines);
            * Geographically adjacent area-wide licences (Part 12 of these guidelines);
            * Aeronautical mobile and aeronautical radionavigation services operating in the 4200–4400 MHz band (Part 13 of these guidelines).

      2.5 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.  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 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 3.4 GHz band.

         Note  The use of other published propagation models applicable to the 3.4 GHz band may also be suitable.

         Part 3 Point-to-point fixed service receivers

3.1 Background
 (1) Point-to-point fixed service receivers operating on frequencies in and adjacent to the 3.4 GHz band are licensed in accordance with the frequency assignment criteria detailed in RALI FX 3.  RALI FX 3 provides details about channel plans for individual microwave bands and guidance on interference criteria and frequency coordination between microwave links to achieve certain performance objectives.  It provides assignment criteria for each frequency band and specifies protection ratios.
 (2) RALI FX 3 is subject to continuing review in consultation with industry, to incorporate improved assignment techniques and changing technology requirements.  Particular account is taken of changes in ITU-R