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Spectrum Summary of GBT Receiver Bands

Spectrum Summary of GBT Receiver Bands. Caveat Emptor:

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Spectrum Summary of GBT Receiver Bands

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  1. Spectrum Summary of GBT Receiver Bands Caveat Emptor: Many of these scans are old by as much as several years. Since there is no systematic archiving of GBT RFI scans, reporting is spotty, and an overview like this is difficult to piece together. Automated, archival monitoring of the RFI environment at Green Bank is one of the goals of our group.

  2. PF1.1: 290 MHz – 395 MHz Military Aircraft (225 MHz – 400 MHz) Evers MOA and others Leaky Local Cable TV, Part 15 devices, unintentional sources

  3. PF1.1: 290 MHz – 395 MHz (cont’d)

  4. PF1.2: 385 MHz – 520 MHz Military aircraft

  5. PF1.3: 510 MHz – 690 MHz RA Band Digital Channels Spectrum dominated by UHF TV stations located outside NRQZ. Only Channel 37 (608 MHz - 614 MHz) really usable. The impending shift to digital broadcasting will only worsen the picture.

  6. PF1.4: 680 MHz – 920 MHz Airphone Services Land Mobile UHF TV Radiolocation Power line? Welding? Fluorescent lights? 902-928 ISM band Intentional Radiators

  7. PF2: 910 MHz – 1230 MHz Radiolocation/ISM Fixed/Mobile (various) Aeronautical Radionavigation (mobile and land based)

  8. L Band: 1150 MHz – 1730 MHz Notch Filter designed to keep radar at Roanoke Airport from overloading receiver. GEOS or NOAA WX ? IRIDIUM: 1621 - 1627 GPS L1: 1575.42 L2: 1227.6 L3: 1381.05 Aeronautical Radionavigation

  9. S Band: 1730 MHz – 2600 MHz 2320 – 2360 Sirus and XM Broadcast Satellites 2400 – 2483.5 ISM band Unlicensed Intentional Radiators All Az, filtered, 2/8/02

  10. S Band: 200 mW WIFI Potential Interference Map

  11. Above S Band • Generally, less terrestrial sources and more satellite and airborne sources. A few possibilities: • 3700-4200 MHz: geostationary satellite TV downlinks • 5725-5850 MHz: ISM band Unlicensed Intentional Radiators • 11.7-12.7 GHz: geostationary satellite TV downlinks

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