The Citizens Band Radio Service, or CB, as it is commonly called, is a type of radio communication under the category of Personal Radio Service. As with the other types of PRS, such as FRS, GMRS, MURS, and LPRS (Low Power Radio Service), CB is intended for both consumer and business use. CB is covered under Part 95 of the FCC rules. A CB radio does not require a license to operate.
CB service operates on 40 shared channels in an AM mode or Single SideBand (SSB) mode. SSB offers less noise and greater range than AM mode and is usually found on higher end CB radios. SSB has two modes, Upper Sideband and Lower Sideband. You can only communicate with other SSB CB radios when in SSB mode.
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