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Radiocommunications Advisory Guidelines (Managing Interference from Spectrum Licensed Transmitters – 850/900 MHz Band) 2021
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Turn the raw legal text into a practical explanation grounded in Radiocommunications Advisory Guidelines (Managing Interference from Spectrum Licensed Transmitters – 850/900 MHz Band) 2021.
(1) After 1 July 2024, the ACMA’s policy is for trunked land-mobile services to operate in a paired band where base station radiocommunications receivers use the 806 MHz to 809 MHz frequency band, and mobile station radiocommunications receivers use the 851 MHz to 854 MHz frequency band. This places land-mobile receivers in these two bands in spectrum lower-adjacent to the 850 MHz band after the commencement of spectrum licences in the 850/900 MHz band. (2) Protection of trunked land-mobile radiocommunications receivers from spectrum licensed radiocommunications transmitters is on a first-in-time basis. The ACMA intends that any existing apparatus licensed receiver, licensed prior to the registration of a spectrum licensed transmitter in the Register, will receive protection in accordance with this instrument.
Note: The Register is established under section 143 of the Act and is available, free of charge, on the ACMA’s website: www.acma.gov.au.
(1) The protection requirements for base station radiocommunications receivers operating in: (a) before 1 July 2024 – the 820 MHz to 825 MHz frequency band; and (b) the 806 MHz to 809 MHz frequency band; for the percentage of time specified in RALI LM 8, are: (c) a wanted signal to unwanted signal level ratio at the receiver input not less than the wanted to unwanted ratio specified in RALI LM 8; and (d) a blocking level at the receiver input not exceeding the blocking level specified in RALI LM 8. (2) The radiofrequency selectivity performance of the base station radiocommunications receiver may be assumed to be at least equal to the performance of a cavity filter with a response as specified in RALI LM 8 tuned to the operating frequency of that receiver. The base station receiver intermediate frequency bandwidth may be assumed to be that specified in RALI LM 8. The base station receiver antenna may be assumed to have a response equivalent to the notional antenna specified in RALI LM 8.
(1) The protection requirements for mobile radiocommunications receivers operating in: (a) before 1 July 2024 – the 865 MHz to 870 MHz frequency band; and (b) the 851 MHz to 854 MHz frequency band; for the percentage of time and percentage of locations specified in RALI LM 8, are: (c) a wanted signal to unwanted signal level ratio at the receiver input not less than the wanted to unwanted ratio specified in RALI LM 8; and (d) a blocking level at the receiver input not exceeding the blocking level specified in RALI LM 8. (2) The mobile radiocommunications receiver intermediate frequency bandwidth may be assumed to be that specified in RALI LM 8.