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51 relations: Amateur radio, Amateur radio frequency allocations, Amateur radio operator, American Radio Relay League, Bandwidth (signal processing), Baud, Colloquialism, Computer, Contesting, Continuous wave, Digital signal processing, Error detection and correction, Fibonacci coding, Forward error correction, Frequency, Hellschreiber, High frequency, Morse code, Multipath propagation, Ogg, Olivia MFSK, Phase-shift keying, PSK63, QRP operation, Quaternary numeral system, Radio frequency, Radio propagation, Radioteletype, Shortwave listening, Shortwave radio, Single-sideband modulation, Skywave, Sound card, Symbol rate, Synchronous conferencing, Throughput, Varicode, WARC bands, Watt, Words per minute, 1.25-meter band, 10-meter band, 15-meter band, 160-meter band, 2-meter band, 20-meter band, 33-centimeter band, 40-meter band, 6-meter band, 70-centimeter band, ..., 80-meter band. Expand index (1 more) »
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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Amateur radio frequency allocations
Amateur radio frequency allocation is done by national telecommunications authorities.
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Amateur radio operator
An amateur radio operator is someone who uses equipment at an amateur radio station to engage in two-way personal communications with other amateur operators on radio frequencies assigned to the amateur radio service.
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American Radio Relay League
The American Radio Relay League (ARRL) is the largest membership association of amateur radio enthusiasts in the USA.
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Bandwidth (signal processing)
Bandwidth is the difference between the upper and lower frequencies in a continuous band of frequencies.
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Baud
In telecommunication and electronics, baud (symbol: Bd) is a common measure of the speed of communication over a data channel.
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Colloquialism
Everyday language, everyday speech, common parlance, informal language, colloquial language, general parlance, or vernacular (but this has other meanings too), is the most used variety of a language, which is usually employed in conversation or other communication in informal situations.
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Computer
A computer is a device that can be instructed to carry out sequences of arithmetic or logical operations automatically via computer programming.
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Contesting
Contesting (also known as radiosport) is a competitive activity pursued by amateur radio operators.
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Continuous wave
A continuous wave or continuous waveform (CW) is an electromagnetic wave of constant amplitude and frequency, almost always a sine wave, that for mathematical analysis is considered to be of infinite duration.
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Digital signal processing
Digital signal processing (DSP) is the use of digital processing, such as by computers or more specialized digital signal processors, to perform a wide variety of signal processing operations.
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Error detection and correction
In information theory and coding theory with applications in computer science and telecommunication, error detection and correction or error control are techniques that enable reliable delivery of digital data over unreliable communication channels.
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Fibonacci coding
In mathematics and computing, Fibonacci coding is a universal code which encodes positive integers into binary code words.
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Forward error correction
In telecommunication, information theory, and coding theory, forward error correction (FEC) or channel coding is a technique used for controlling errors in data transmission over unreliable or noisy communication channels.
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Frequency
Frequency is the number of occurrences of a repeating event per unit of time.
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Hellschreiber
The Hellschreiber, Feldhellschreiber or Typenbildfeldfernschreiber (also Hell-Schreiber named after its inventor Rudolf Hell) is a facsimile-based teleprinter invented by Rudolf Hell.
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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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Morse code
Morse code is a method of transmitting text information as a series of on-off tones, lights, or clicks that can be directly understood by a skilled listener or observer without special equipment.
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Multipath propagation
In wireless telecommunications, multipath is the propagation phenomenon that results in radio signals reaching the receiving antenna by two or more paths.
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Ogg
Ogg is a free, open container format maintained by the Xiph.Org Foundation.
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Olivia MFSK
Olivia MFSK is an amateur radioteletype protocol, using multiple frequency-shift keying (MFSK) and designed to work in difficult (low signal-to-noise ratio plus multipath propagation) conditions on shortwave bands.
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Phase-shift keying
Phase-shift keying (PSK) is a digital modulation process which conveys data by changing (modulating) the phase of a constant frequency reference signal (the carrier wave).
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PSK63
PSK63 (meaning Phase Shift Keying at a rate of 63 baud) is a digital radio modulation mode used primarily in the amateur radio field to conduct real-time keyboard-to-keyboard informal text chat between amateur radio operators.
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QRP operation
In amateur radio, QRP operation refers to transmitting at reduced power while attempting to maximize one's effective range.
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Quaternary numeral system
Quaternary is the base- numeral system.
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Radio frequency
Radio frequency (RF) refers to oscillatory change in voltage or current in a circuit, waveguide or transmission line in the range extending from around twenty thousand times per second to around three hundred billion times per second, roughly between the upper limit of audio and the lower limit of infrared.
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Radio propagation
Radio propagation is the behavior of radio waves as they travel, or are propagated, from one point to another, or into various parts of the atmosphere.
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Radioteletype
Radioteletype (RTTY) is a telecommunications system consisting originally of two or more electromechanical teleprinters in different locations connected by radio rather than a wired link.
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Shortwave listening
Shortwave listening, or SWLing, is the hobby of listening to shortwave radio broadcasts located on frequencies between 1700 kHz and 30 MHz.
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Shortwave radio
Shortwave radio is radio transmission using shortwave radio frequencies.
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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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Sound card
A sound card (also known as an audio card) is an internal expansion card that provides input and output of audio signals to and from a computer under control of computer programs.
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Symbol rate
In digital communications, symbol rate, also known as baud rate and modulation rate, is the number of symbol changes, waveform changes, or signaling events, across the transmission medium per time unit using a digitally modulated signal or a line code.
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Synchronous conferencing
Synchronous conferencing is the formal term used in computing, in particular in computer-mediated communication, collaboration and learning, to describe technologies informally known as online chat.
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Throughput
In general terms, throughput is the maximum rate of production or the maximum rate at which something can be processed.
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Varicode
Varicode is a self-synchronizing code for use in PSK31.
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WARC bands
The WARC bands are three portions of the shortwave radio spectrum used by licensed and/or certified amateur radio operators.
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Watt
The watt (symbol: W) is a unit of power.
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Words per minute
Words per minute, commonly abbreviated wpm (sometimes uppercased WPM), is a measure of words processed in a minute, often used as a measurement of the speed of typing, reading or Morse code sending and receiving.
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1.25-meter band
The 1.25 meter, 220 MHz or 222 MHz band is a portion of the VHF radio spectrum internationally allocated for amateur radio use on a primary basis in ITU Region 2, and it comprises frequencies from 220 MHz to 225 MHz.
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10-meter band
The 10-meter band is a portion of the shortwave radio spectrum internationally allocated to amateur radio and amateur satellite use on a primary basis.
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15-meter band
The 15-meter band (also called the 21-MHz band or 15 meters) is an amateur radio frequency band spanning the shortwave spectrum from 21 to 21.45 MHz.
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160-meter band
Just above the mediumwave broadcast band, 160 meters refers to the band of radio frequencies between 1800 and 2000 kHz, which is the lowest radio frequency band allocated for use by amateur radio in most countries.
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2-meter band
The 2-meter amateur radio band is a portion of the VHF radio spectrum, comprising frequencies stretching from 144 MHz to 148 MHz in International Telecommunication Union region (ITU) Regions 2 (North and South America plus Hawaii) and 3 (Asia and Oceania) and from 144 MHz to 146 MHz in ITU Region 1 (Europe, Africa, and Russia).
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20-meter band
The 20-meter or 14-MHz amateur radio band is a portion of the shortwave radio spectrum, comprising frequencies stretching from 14.000 MHz to 14.350 MHz.
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33-centimeter band
The 33-centimeter or 900 MHz band is a portion of the UHF radio spectrum internationally allocated to amateur radio on a secondary basis.
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40-meter band
The 40-meter or 7-MHz band is an amateur radio frequency band, spanning 7000-7300 kHz in ITU Region-2, and 7000-7200 kHz in Regions 1 & 3.
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6-meter band
The 6-meter band is the lowest portion of the very high frequency (VHF) radio spectrum allocated to amateur radio use.
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70-centimeter band
The 70-centimeter or 440 MHz band is a portion of the UHF radio spectrum internationally allocated to amateur radio and amateur satellite use.
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80-meter band
The 80 meter or 3.5 MHz band is a band of radio frequencies allocated for amateur radio use, from 3.5 to 4.0 MHz in IARU Region 2, and generally 3.5 to 3.8 or 3.9 MHz in Regions 1 and 3 respectively.
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Redirects here:
BPSK31, PSK-31, Phase Shift Keying, 31 Baud, Psk31, Qpsk31.
References
[1] https://en.wikipedia.org/wiki/PSK31
