Document ID: chunk:federal_register_of_legislation:F2023C00946:body:0:p6
Version: federal_register_of_legislation:F2023C00946
Segment Type: other
Provision Reference: 
Character Range: 14652–18138

with incumbent FSS Earth receive licensees to resolve any interference issues.

      4.3 Protection requirements – FSS Earth receive stations operating in the 3600-4200 MHz band under earth receive licences
      (1) Radiocommunications transmitters operated under a spectrum licence in the 3.4 GHz band must protect earth receive stations for fixed-satellite services from co-channel emissions, unwanted emissions and receiver overload, if the radiocommunications receiver for the earth receive station:

           (a)               is operated under an earth receive licence;
           (b)               was registered in the Register prior to the date on which the radiocommunications transmitter operated under the spectrum licence is registered;
           (c)               is located within:

              (i) 100 km of and not operating co-channel to a radiocommunications transmitter operated under a spectrum licence in the 3.4 GHz band; or

              (ii) 200 km of and operating co-channel to a radiocommunications transmitter operated under a spectrum licence in the 3600-3800 MHz frequency band; and

           (d)               is operating in the 3600 to 4200 MHz band.
(2) Earth receive stations for fixed-satellite services are to be protected from co-channel emissions to a maximum interference level of -128.6 dBm/MHz not to be exceeded for more than 20% of the time.
         Note  Refer to Recommendation ITU-R SF.1006 for further guidance on the procedure to use for the protection of earth receive stations for fixed-satellite services.
(3) Earth receive stations are to be protected from unwanted emissions (out-of-band and spurious) to a level of -128.6 dBm/MHz, assuming a receiver noise temperature of 100K which is not to be exceeded for more than 20% of the time.
         Note When assessing interference from unwanted emissions, the highest level of out-of-band or spurious emissions that fall within the licensed bandwidth of the FSS Earth station receiver should be considered in calculations.
(4) A radiocommunications transmitter operated under a spectrum licence in the 3.4 GHz band is not considered to overload the receiver of an FSS Earth station if the total power received from the interfering service at the input of an FSS Earth station receiver (i.e. after considering Antenna gain, radiofrequency (RF) filtering and other losses) does not exceed -65 dBm. Before 16 July 2027, the minimum RF filtering level described in Table 1, at the front end of the Earth receive station for different frequency offsets, should be assumed.
  On and after 16 July 2027, the minimum RF filtering level described in Table 2 should be assumed.

Frequency offset from appropriate frequency limit of licence for earth station receiver (MHz)  Rejection (dB)
< 50                                                                                           0.5 + 0.6*foffset (MHz)
<110                                                                                           45.5
< 150                                                                                          30.5 + 0.25*(foffset (MHz)-50)
< 200                                                                                          55.5
≥ 200                                                                                          70

    Table 1: Minimum frequency response of earth receive station's RF filter before 16 July 2027
Frequency offset from appropriate frequency limit of