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The Regional Advisory Committee (RAC), Owners and Operators Committee, and Users Group are all meeting on Thursday May 20th.

 
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Narrow band, or narrow banding is a process that the Federal Communications Commission (FCC) is requiring of all Land Mobile Radio (LMR) users by 2011.

As there is only a finite amount of radio spectrum, and there is more and more demand for this spectrum by users world-wide the FCC has mandated that  LMR users reduce the spectrum that each radio channel use by 50%.

LMR users typically used 25KHz (Kilohertz) channel spacing.  The FCC is requiring this be cut to 12.5KHz.

ALL "wide band" radios must be replaced by 2011.

There are several options for replacing these radios and radio systems:

  1. Use narrow-band analog radios
    • Advantages:
        1. Many "newer" wideband radios are narrow band capable.
        2. Least costly mobile and portable radios.
    • Disadvantages
    1. Less range - More towers needed to maintain the same level of communications as with wide-band
    2. Inefficient use of spectrum and infrastructure (compared to Trunking)
  2. Use Narrow-band "Conventional" digital radios
    • Advantages
    1. Better range than narrow-band analog.
    2. easier use of encryption.
    • Disadvantages
    1. higher cost than analog narrow-band
    2. Inefficient use of spectrum and infrastructure (compared to Trunking)
  3. Use of Narrow-band Trunking digital radios
    • Advantages
    1. Better range than narrow-band analog.
    2. easier use of encryption.
    3. More efficient use of spectrum and infrastructure
    • Disadvantages
    1. Highest cost of all options.
  4. Use of Narrow-band Trunking digital radios on a Shared System
    • Advantages
    1. Better range than narrow-band analog.
    2. easier use of encryption.
    3. More efficient use of spectrum and infrastructure
    4. Less expensive than wholy-owned trunked system. Infrastructure cost is shared among users.
    • Disadvantages
    1. May be more expensive than some of the other options presented.

 

 
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