2013 FCC Narrowbanding Mandate:
What Does it Mean to Your Agency?
THIRD MEMORANDUM OPINION AND ORDER, THIRD FURTHER NOTICE OF PROPOSED RULE MAKING AND ORDER FCC 04-292 Released December 23, 2004
Implementation of Sections 309(j) and 337 of the Communications Act of 1934 as Amended Promotion of Spectrum Efficient Technologies on Certain Part 90 Frequencies
History
The Federal Communications Commission (FCC) has put together a plan to achieve greater spectrum efficiency in the private land mobile radio bands. This is known as refarming or rebanding, and was made necessary by the ever-increasing demands on available radio spectrum.
The FCC’s answer was to effectively double the number of frequencies by cutting them in half, so to speak, by reducing the bandwidth from 25 kHz to 12.5 kHz, or from wide band to narrow band.
Using narrow band channels will ensure that agencies take advantage of more efficient technology and, by reducing channel width, will allow additional channels to exist within the same spectrum space, as illustrated in figure 1.
Important Dates
To phase in the migration deadline of January 1, 2013, the FCC has established interim deadlines.
The first important deadline is January 1, 2011after which:
- The FCC will not grant applications for new voice operations or applications to expand the authorized contour of existing stations that use 25 kHz channels. Only narrow band authorizations will be granted.
- New system applications must be 12.5 kHz or less
- No 25 kHz system expansion permitted
- MOTOTRBO™ meets this requirement
January 1, 2013
- All existing licenses must operate on channels with a bandwidth of 12.5 KHz or less (narrow band). Failure to comply with the January 1, 2013 deadline results in cancellation of license.
- I/B and PS 150-512 MHz incumbents must migrate to 12.5/12.5 kHz (e) or less
- The FCC will prohibit manufacture or importation of new equipment that operates on 25 kHz channels.
- New equipment submitted for FCC type-acceptance must be capable of operating in 6.25 kHz mode.
- It is unclear what happens to licensed 25 kHz systems after this date certain
Land Mobile Radio Systems still using wideband channels as of January 1, 2013, risk the following:
- Loss of Radio Communications
- Substantial FCC Fines
- Revocation of FCC Licenses
What to do?
- Check your current license for wide or narrow band status
- If license is wide band, re-license to narrow band
- If your equipment is narrow band capable, reprogram equipment to narrow band operation
- If equipment is wide band only capable, you must purchase new equipment