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45 relations: Amateur radio, Amplitude modulation, Australian Communications and Media Authority, B-Netz, Brazil, Business band, Canada, China, Citizens band radio, Continuous Tone-Coded Squelch System, Digital private mobile radio, Dual-tone multi-frequency signaling, Europe, Family Radio Service, Freenet (radio), Frequency allocation, Frequency modulation, Frequency-division multiple access, Frequency-shift keying, General Mobile Radio Service, Grandfather clause, Great Britain, High frequency, Hong Kong, KDR 444, Line-of-sight propagation, LPD433, Macau, Marine VHF radio, Mexico, Multi-Use Radio Service, PMR446, Push-to-talk, Radio repeater, Repeaters, Single-sideband modulation, Skywave, South America, Time-division multiple access, Tourism, Tragedy of the commons, UHF CB, Ultra high frequency, Very high frequency, Walkie-talkie.
Amateur radio
Amateur radio, also known as ham radio, describes the use of radio frequency spectrum for purposes of non-commercial exchange of messages, wireless experimentation, self-training, private recreation, radiosport, contesting, and emergency communication.
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Amplitude modulation
Amplitude modulation (AM) is a modulation technique used in electronic communication, most commonly for transmitting information via a radio carrier wave.
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Australian Communications and Media Authority
The Australian Communications and Media Authority (ACMA) is an Australian Government statutory authority within the Communications portfolio.
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B-Netz
B-Netz was an analog, commercial mobile radio telephone network that was operated by the Deutsche Bundespost in Germany (at first only West Germany) from 1972 until 1994.
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Brazil
Brazil (Brasil), officially the Federative Republic of Brazil (República Federativa do Brasil), is the largest country in both South America and Latin America.
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Business band
The business band is the name used by US radio users who utilize and scanner hobbyists who listen to the Federal Communications Commission (FCC) Industrial/Business pool frequencies.
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Canada
Canada is a country located in the northern part of North America.
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China
China, officially the People's Republic of China (PRC), is a unitary one-party sovereign state in East Asia and the world's most populous country, with a population of around /1e9 round 3 billion.
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Citizens band radio
Citizens band radio (also known as CB radio) is, in many countries, a system of short-distance radio communications between individuals typically on a selection of 40 channels within the 27 MHz (11 m) band.
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Continuous Tone-Coded Squelch System
In telecommunications, Continuous Tone-Coded Squelch System or CTCSS is a circuit that is used to reduce the annoyance of listening to other users on a shared two-way radio communications channel.
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Digital private mobile radio
dPMR or digital private mobile radio, is a Common Air Interface (CAI) for digital mobile communications.
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Dual-tone multi-frequency signaling
Dual-tone multi-frequency signaling (DTMF) is an in-band telecommunication signaling system using the voice-frequency band over telephone lines between telephone equipment and other communications devices and switching centers.
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Europe
Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere.
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Family Radio Service
The Family Radio Service (FRS) is an improved walkie-talkie radio system authorized in the United States since 1996.
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Freenet (radio)
Freenet is a personal mobile radio network in Germany.
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Frequency allocation
Frequency allocation (or spectrum allocation or spectrum management) is the allocation and regulation of the electromagnetic spectrum into radio frequency bands, which is normally done by governments in most countries.
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Frequency modulation
In telecommunications and signal processing, frequency modulation (FM) is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave.
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Frequency-division multiple access
Frequency division multiple access (FDMA) is a channel access method used in multiple-access protocols as a channelization protocol.
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Frequency-shift keying
Frequency-shift keying (FSK) is a frequency modulation scheme in which digital information is transmitted through discrete frequency changes of a carrier signal.
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General Mobile Radio Service
The General Mobile Radio Service (GMRS) is a land-mobile FM UHF radio service designed for short-distance two-way communication.
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Grandfather clause
A grandfather clause (or grandfather policy) is a provision in which an old rule continues to apply to some existing situations while a new rule will apply to all future cases.
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Great Britain
Great Britain, also known as Britain, is a large island in the north Atlantic Ocean off the northwest coast of continental Europe.
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High frequency
High frequency (HF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) between 3 and 30 megahertz (MHz).
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Hong Kong
Hong Kong (Chinese: 香港), officially the Hong Kong Special Administrative Region of the People's Republic of China, is an autonomous territory of China on the eastern side of the Pearl River estuary in East Asia.
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KDR 444
KDR 444 (Norwegian "kortdistanseradio", Swedish "kortdistansradio", "short distance radio") or KDR, is a licence-free personal radio service in the UHF range used in Sweden and Norway.
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Line-of-sight propagation
Line-of-sight propagation is a characteristic of electromagnetic radiation or acoustic wave propagation which means waves travel in a direct path from the source to the receiver.
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LPD433
LPD433 (low power device 433 MHz) is a UHF band in which licence free communication devices are allowed to operate in some regions.
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Macau
Macau, officially the Macao Special Administrative Region of the People's Republic of China, is an autonomous territory on the western side of the Pearl River estuary in East Asia.
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Marine VHF radio
Marine VHF radio refers to the radio frequency range between 156 and 174 MHz, inclusive.
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Mexico
Mexico (México; Mēxihco), officially called the United Mexican States (Estados Unidos Mexicanos) is a federal republic in the southern portion of North America.
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Multi-Use Radio Service
In the United States, the Multi-Use Radio Service (MURS) is an unlicensed two-way radio service similar to Citizens Band (CB).
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PMR446
PMR446 (personal mobile radio, 446 MHz) is a part of the UHF radio frequency range that is open without licensing for business and personal use in most countries of the European Union.
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Push-to-talk
Push-to-talk (PTT), also known as press-to-transmit, is a method of having conversations or talking on half-duplex communication lines, including two-way radio, using a momentary button to switch from voice reception mode to transmit mode.
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Radio repeater
A radio repeater is a combination of a radio receiver and a radio transmitter that receives a signal and retransmits it, so that two-way radio signals can cover longer distances.
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Repeaters
Repeaters is a 2010 Canadian thriller film directed by Carl Bessai, written by Arne Olsen, and starring Dustin Milligan, Amanda Crew, and Richard de Klerk as young drug addicts who find themselves stuck in a time loop.
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Single-sideband modulation
In radio communications, single-sideband modulation (SSB) or single-sideband suppressed-carrier modulation (SSB-SC) is a type of modulation, used to transmit information, such as an audio signal, by radio waves.
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Skywave
In radio communication, skywave or skip refers to the propagation of radio waves reflected or refracted back toward Earth from the ionosphere, an electrically charged layer of the upper atmosphere.
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South America
South America is a continent in the Western Hemisphere, mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere.
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Time-division multiple access
Time-division multiple access (TDMA) is a channel access method for shared-medium networks.
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Tourism
Tourism is travel for pleasure or business; also the theory and practice of touring, the business of attracting, accommodating, and entertaining tourists, and the business of operating tours.
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Tragedy of the commons
The tragedy of the commons is a term used in social science to describe a situation in a shared-resource system where individual users acting independently according to their own self-interest behave contrary to the common good of all users by depleting or spoiling that resource through their collective action.
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UHF CB
UHF CB is a class-licensed citizen's band radio service authorised by the governments of Australia, New Zealand, Vanuatu, and Malaysia in the UHF 477 MHz band.
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Ultra high frequency
Ultra high frequency (UHF) is the ITU designation for radio frequencies in the range between 300 megahertz (MHz) and 3 gigahertz (GHz), also known as the decimetre band as the wavelengths range from one meter to one decimeter.
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Very high frequency
Very high frequency (VHF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) from 30 to 300 megahertz (MHz), with corresponding wavelengths of ten to one meter.
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Walkie-talkie
A walkie-talkie (more formally known as a handheld transceiver, or HT) is a hand-held, portable, two-way radio transceiver.
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References
[1] https://en.wikipedia.org/wiki/Personal_radio_service
