Document ID: chunk:federal_register_of_legislation:F2021L01149:reg:1
Version: federal_register_of_legislation:F2021L01149
Segment Type: reg
Provision Reference: reg 1
Character Range: 26069–28100

1  Performance parameters
 (1) The notional level of performance for a radiocommunications receiver operated under a spectrum licence in the 850/900 MHz band in relation to an unwanted signal from a radiocommunications transmitter operated under an apparatus licence, relates to:
(a) adjacent channel selectivity;
(b) receiver intermodulation response rejection; and
(c) receiver blocking.
 (2) This level of performance is taken to be a notional level of performance with reference to a radiocommunications receiver sensitivity level of:
(a) -96 dBm measured within a 5 MHz rectangular bandwidth that is within the frequency band of the spectrum licence, for a receiver with a bandwidth of less than 20 MHz; and
(b) -89 dBm measured within a 20 MHz rectangular bandwidth that is within the frequency band of the spectrum licence, for a receiver with a bandwidth equal to or greater than 20 MHz.
 (3) A notional radiofrequency selectivity for the radiocommunications receiver (between the antenna and the antenna connector of the equipment) may be assumed to be at least equal to:
(a) 2 + 60∙log10[1+(2∙FreqOffset/5)1.5]  dB for FreqOffset ≤ 2.5 MHz;
(b) 2 + 60∙log10[1+(2∙FreqOffset/5)2]  dB for  2.5 < FreqOffset ≤ 9 MHz; and
(c) 70dB for FreqOffset > 9 MHz;

       where FreqOffset is the smallest frequency difference between either the upper or lower limits of the frequency band of the spectrum licence under which the receiver operates and any frequency outside that frequency band.
 (4) For the purposes of verifying these performance parameters of the notional radiocommunications receiver, the comparison of the sensitivity level and the unwanted signal is defined at the antenna connector port of the receiver unit. In this way, the performance of the entire receiving system, including the receiver unit and external filters, is taken into account.
 (5) All frequency offsets are specified with reference to the upper and lower limits of the frequency bands of the spectrum licence under which the receiver operates.