is Narrowbanding? Private land mobile radio (LMR) systems - including municipal government and State and local public safety systems - use blocks of radio spectrum called channels... to exist in the same spectrum. Who is affected by Narrowband? The FCC Narrowbanding rules affect all operators of land mobile radios (LMR) that use channels between: 150 and 174 MHz 421.../B and PS 150-512 MHz incumbents must migrate to 12.5/12.5 kHz (e) or less It is unclear what happens to licensed 25 kHz systems after this date certain Land Mobile Radio Systems...

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