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business band
The business band is the name used by US radio users and scanner hobbyists who listen to Federal Communications Commission (FCC) licensees using Industrial/Business pool frequencies. The regulations listing frequencies in this pool are contained in Subpart C of Part 90, Title 47 of the CFR.
==Overview==
The pool describes a series of frequencies on the VHF and UHF two-way radio bands. They are reserved for use by companies and individuals operating commercial activities; educational, philanthropic, or ecclesiastical institutions; clergy activities or hospitals, clinics, or medical associations.〔(Section 90.35 of the FCC rules )〕 In the United States, use of these frequencies requires a license issued by the U.S. FCC. The exceptions to this are five specific frequencies that are also part of the Multi-Use Radio Service, which permits unlicensed operation on these frequencies, provided the output power does not exceed 2 watts. There are also other frequencies such as citizen's band and Family Radio Service that may be used without a license.
Channels are available in several frequency ranges to suit the users' requirements for propagation and protection from interference. The electromagnetic spectrum between approximately 450 and 470 MHz is used largely for UHF business communications, although this spectrum is not exclusively for business use. In some large metropolitan areas, such as New York, the UHF-T band (between 470 and 512 MHz) is also used, due to congestion on the standard VHF or UHF bands. There are also a number of specific frequencies, in both the VHF and UHF spectrum, that are for business use; some of these have color-coded names, such as Blue Dot or Red Star.
In 2004, the FCC required all CFR 47 Part 90 VHF (150–174 MHz) and UHF (421–470 MHz) PLMR (Private Land Mobile Radio) licensees operating legacy wideband (25 kHz bandwidth) voice or data/SCADA systems to migrate to narrowband (12.5 kHz bandwidth or equivalent) systems] by January 1, 2013.〔(FCC Order issued in December of 2004 )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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