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ATCA External RFI

External interference has two main sources - satellites and ground-based (terrestrial) emitters. Most ground based emitters are in the Nandewar ranges (Mt. Dowe & The Governor). However, there are other terrestrial emitters which have been identified from time to time.

Here are some useful search tools:
  • Search tool of ACMA licensed terrestrial emitters.(may require unix login)
  • SaRFIs, search tool of possible satellite emitters.

    • Mt Dowe - TV Transmissions

      529.500 MHz (BW 6MHz) (UHF Ch28 - digital)
  536.500 MHz (BW 6MHz) (UHF Ch29 - digital)
  543.500 MHz (BW 6MHz) (UHF Ch30 - digital)
  550.500 MHz (BW 6MHz) (UHF Ch31 - digital)
  557.500 MHz (BW 6MHz) (UHF Ch32 - digital)

    Mt Cenn Cruaich TV Transmissions

      177.500 MHz (BW 6MHz) (VHF Ch6)
  184.500 MHz (BW 6MHz) (VHF Ch7)
  212.500 MHz (BW 6MHz) (VHF Ch10)
  219.500 MHz (BW 6MHz) (VHF Ch11)
  226.625 MHz (BW 6MHz) (VHF Ch12)

    Known RFI that could be detected in band (in ascending frequency order)

      Mobile Phones (700MHz 4G-B28)
    703-748 MHz (Handset to Base)
    758-803 MHz (Base to Handset)
	
  Mobile Phones (850MHz 3G-B5, 5G-n5)
    830-845 MHz (Handset to Base)
    875-890 MHz (Base to Handset)
	
  Mobile Phones (900MHz 4G-B8)
    890-915 MHz (Handset to Base)
    935-960 MHz (Base to Handset)
  
  Aeronautical beacons (960-1210 MHz)
    1030 MHz (Aircraft)
    1090 MHz (Aircraft)
	
  Mt Dowe TV transmitter harmonics
    1059 MHz (BW 12MHz - digital) (Mt Dowe TV transmitter - 2nd harmonic)
    1073 MHz (BW 12MHz - digital) (Mt Dowe TV transmitter - 2nd harmonic)
    1087 MHz (BW 12MHz - digital) (Mt Dowe TV transmitter - 2nd harmonic)
    1101 MHz (BW 12MHz - digital) (Mt Dowe TV transmitter - 2nd harmonic)
    1115 MHz (BW 12MHz - digital) (Mt Dowe TV transmitter - 2nd harmonic)

  1227.6 MHz (BW 20.46MHz) (GPS L2 precision code)

  1240-1252 MHz (1246 + n x 0.4375 where n = -7,7) (Glonass Satellite positioning - like GPS)

  1381.05 MHz (BW 4MHz) (GPS L3 code)

  1.5GHz Terrestrial Microwave Link Band (1427-1535 MHz)
    1434.5 1448.5 1458.5 1495 1499 1501 1509 MHz                                        (BW 4MHz) (Other microwave link transmissions)
    1433.5 1437.5 1439.5 1445.5 1451.5 1453.5 1459.5 1463.5 1494 1498 1506 1514 1524MHz (BW 2MHz) (Other microwave link transmissions)

  L-band Satellite band (1525-1660MHz)
    1525 - 1560 MHz (Inmarsat sat phone system - downlinks)
    1525 - 1560 MHz (Thuraya sat phone system - downlinks)
    1545 - 1559 MHz (Optus Mobilesat phone system - geosynchronous orbit)
    1575.42 MHz (GPS L1 coarse/acquisition code)
    1603 - 1615 MHz (Glonass Satellite positioning - like GPS)
    1610 - 1621.35 MHz (Globalstar global satellite phone system - uplinks)
    1626 - 1660.5 MHz (Thuraya sat phone system - uplinks)

  1.8GHz Mobile Phones (4G-B3)
    1710-1785 MHz (Handset to Base)
    1805-1880 MHz (Base to Handset)
	
  2.1GHz Mobile Phones (4G-B1)
    1920-1980 MHz (Handset to Base)
    2110-2170 MHz (Base to Handset)
	 
  2.3GHz NBN Wireless / Mobile Wireless (4G-B40 5G-n40)
    2302-2400MHz (Customer to Base & Base to Customer - TDD)

  S-band Globalstar satellite phone system downlinks
    2490.54 MHz (BW 1.23MHz) (Globalstar global satellite phone system - downlink)
    2491.77 MHz (BW 1.23MHz) (Globalstar global satellite phone system - downlink)
    2495.46 MHz (BW 1.23MHz) (Globalstar global satellite phone system - downlink)
	
  2.6GHz Mobile Phones (2600MHz 4G-B7)
    2510-2570 MHz (Handset to Base)
    2630-2690 MHz (Base to Handset)

  2880MHz Weather Radar - Gunnedah (BW 1MHz)
  
  5625MHz Weather Radar - Moree (BW 6MHz)

  5.8GHz ISM unlicensed band (5725-5875MHz) wireless LAN, cordless phones

  6GHz Terrestrial Microwave Link Band (5925-6425 MHz)
    5945.2 MHz (BW 30MHz) (Mt Dowe microwave link transmission)

  6.7GHz Terrestrial Microwave Link Band (6425-7110 MHz)
    6460 MHz (BW 40MHz) (Haystack Mountain, Bellata - microwave link transmission)

  8GHz Terrestrial Microwave Link Band (7725-8275 MHz)
    7762.525 MHz (BW 30MHz)           (Wee Waa microwave link transmission)
    7762.525 7881.125 MHz (BW 30 MHz) (Haystack Mountain, Bellata or Narrabri microwave link transmissions)
    8073.845 MHz (BW 30MHz)           (Bohena Ck microwave link transmission)
    8073.845 8192.445 MHz (BW 30MHz)  (Mt Dowe microwave link transmissions)
    Original: Derek McKay (3-Apr-1995)
    Modified: Peter Mirtschin (06-Oct-2023)