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Understanding FCC Narrowbanding: Key Changes and Deadlines for Radio Channels

FCC narrowbanding is a regulatory shift requiring land mobile radio channels to operate at narrower bandwidths. This process impacts channels licensed at both 25 kHz and 12.5 kHz, with important deadlines for compliance. By January 1, 2011, new licenses for 25 kHz efficiency are banned, and by January 1, 2013, all operations must meet a minimum of 12.5 kHz equivalent efficiency. This overview outlines what radio license holders need to do, including inventorying existing equipment and establishing migration plans to ensure compliance with the new FCC regulations.

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Understanding FCC Narrowbanding: Key Changes and Deadlines for Radio Channels

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Presentation Transcript

  1. FCC Narrowbanding Overview What is a radio channel? What is narrowbanding? What are the FCC deadlines?

  2. The Radio Spectrum

  3. Land Mobile Radio Channels Channels licensed at 25 kHz bandwidth 25 kHz 25 kHz Center Frequency 462.4750 MHz Center Frequency 462.5000 MHz

  4. Land Mobile Radio Channels Channels licensed at 12.5 kHz bandwidth 12.5 kHz 12.5 kHz 12.5 kHz Center Frequency 462.4750 MHz Center Frequency 462.4875 MHz Center Frequency 462.5000 MHz

  5. Equipment Certification/Sales Since 2/14/97: Certifications must include 12.5 kHz equivalent efficiency or better 1/1/2011: Can no longer certify, manufacture or import 25 kHz efficiency mode 1/1/2011: Certifications must include 6.25 kHz equivalent efficiency* (Can be dual mode 12.5/6.25 kHz efficiency) FCC VHF/UHF Narrowbanding Rules (150-174, 421-512 MHz) User Licensing/ Operation • 1/1/2011: No new/expanded 25 kHz efficiency licenses issued** • 1/1/2013: All operations must be 12.5 kHz equivalent efficiency or better** • No 6.25 kHz or equivalent efficiency user requirements have been set yet ** Paging-only channels are exempt from narrowbanding rules *Except for hand-held transmitters with output power of 2 watts or less

  6. Radio Performance Factors • Potentially cleaner channel • Lower (weaker) audio • Reduced coverage 25 kHz 12.5 kHz

  7. What should VHF and UHF license holders do? • Inventory radios • Identify radios that will narrowband • Identify radios that need to be replaced • Establish a migration schedule • Execute a cutover plan

  8. Questions?

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