Citizens' band radio

related topics
{system, computer, user}
{law, state, case}
{company, market, business}
{car, race, vehicle}
{album, band, music}
{math, energy, light}
{service, military, aircraft}
{country, population, people}
{black, white, people}
{water, park, boat}
{line, north, south}
{film, series, show}
{@card@, make, design}
{ship, engine, design}

Citizens' Band radio (often shortened to CB radio) is, in many countries, a system of short-distance radio communications between individuals on a selection of 40 channels within the 27-MHz (11 m) band. The CB radio service is distinct from FRS, GMRS, MURS, or amateur ("ham") radio. In many countries, CB does not require a license and, unlike amateur radio, it may be used for business as well as personal communications. Like many other two-way radio services, Citizens' Band channels are shared by many users. Only one station may transmit at a time. Other stations must listen and wait for the shared channel to be available.

Over time, several countries have created similar radio services, with varying requirements for licensing and differing technical standards. While they may be known by other names, such as General Radio Service in Canada,[1] they often use similar frequencies (26 to 28 MHz), and have similar uses, and similar difficulties with antennas and propagation. Licenses may be required, but eligibility is generally simple.

Some countries have personal radio services in the UHF band, such as the European PMR446 and the Australian UHF CB.

Contents

Full article ▸

related documents
Virtual private network
Cable modem
OS/2
Apple IIe
Digital video
Peripheral Component Interconnect
PAL
MPEG-2
Mac OS
Random-access memory
MS-DOS
History of Microsoft Windows
Non-linear editing system
Programmable logic device
GeForce FX Series
Computer data storage
Superheterodyne receiver
Software cracking
IEEE 802.11
Workstation
PowerBook
Industry Standard Architecture
CMOS
Car audio
File Transfer Protocol
Data General Nova
Symbolics
OSI model
Crossbar switch
X10 (industry standard)