Part 4 Fixed service receivers

12 Background

(1) Fixed services receivers, including point-to-point links and point-multipoint link services, operate in the frequency bands 804 MHz to 806 MHz and 845 MHz to 851 MHz, adjacent to the 850/900 MHz band. SOB links also operate in this band, predominately in the 845 MHz to 846.5 MHz segment. (2) RALI FX 22 specifies the arrangements for all fixed point-to-point links and RALI FX 16 specifies arrangements for point-to-multipoint services in the frequency range 804 MHz to 851 MHz. Protection of fixed link radiocommunications receivers from spectrum licensed radiocommunications transmitters is on a first-in-time basis. The ACMA intends that any existing apparatus licensed fixed link receiver, licensed prior to the registration of a spectrum licensed transmitter in the Register, will receive protection in accordance with this instrument. A SOB link is typically operated on a temporary, transportable basis. Given the ad hoc nature of their operation, a SOB link is operated on a “no interference/no protection” basis in the 845 MHz to 851 MHz frequency band with regard to fixed links of the primary service planned in the spectrum plan, other SOB links and spectrum licensed services that operate in the 850/900 MHz band.

Note The phrase “no interference/no protection” refers to a service operating on the basis that it does not cause interference to a primary service and will not receive protection from that service. SOB link apparatus licences that authorise operation in the 845 MHz to 851 MHz frequency band are subject to a special licence condition. The condition requires that no interference may be caused to any radiocommunications station, or any service operating on a primary basis.

13 Protection requirements

(1) Spectrum licensees are to ensure that authorised radiocommunications transmitters protect fixed point-to-point link receivers to the level detailed in section 4.2.2 and section 6.2.2 of RALI FX 22. (2) Spectrum licensees are to ensure that authorised radiocommunications transmitters protect fixed point-to-multipoint service receivers according to the protection ratio and usable sensitivity level detailed in RALI FX 16.