Dictionary of Ham Radio Terms: Difference between revisions
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'''AC''' : Alternating Current | '''AC''' : Alternating Current | ||
'''ADC''' : Analogue to Digital Converter. Also known as A/D and A-to-D. A device that samples an analogue wave and converts it | '''ADC''' : Analogue to Digital Converter. Also known as A/D and A-to-D. A device that samples an analogue wave and converts it into a digital signal, in which a series of numbers is used to represent the amplitude of the original wave. | ||
'''[[ADIF]]''' : Amateur Data Interchange Format, a standard specification for format of exported logbook files. | |||
'''Admittance''' : The reciprocal of [[Impedance |impedance]] of a component in a series or parallel tuned circuit. | '''Admittance''' : The reciprocal of [[Impedance |impedance]] of a component in a series or parallel tuned circuit. | ||
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'''AFC''' : Automatic Frequency Control - used to prevent drift in FM receivers | '''AFC''' : Automatic Frequency Control - used to prevent drift in FM receivers | ||
'''AFSK''' : Audio Frequency Shift Keying. | |||
'''AGC''' : Automatic Gain Control - a feedback system to reduce fading by automatically adjusting gain | '''AGC''' : Automatic Gain Control - a feedback system to reduce fading by automatically adjusting gain | ||
'''AGL''' : (Height) Above Ground Level, for antenna installations. | |||
'''ALC''' : Automatic Level Control - a feedback system in the transmitter output amplifier used to prevent overload. | '''ALC''' : Automatic Level Control - a feedback system in the transmitter output amplifier used to prevent overload. | ||
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'''AMSAT''' : The name for amateur radio [[Satellites |satellite]] organizations world-wide, but in particular the Radio Amateur Satellite Corporation. | '''AMSAT''' : The name for amateur radio [[Satellites |satellite]] organizations world-wide, but in particular the Radio Amateur Satellite Corporation. | ||
'''AM''' : Amlpitude Modulation | |||
'''Amplifier''' : A device that is used to increase voltage, current or power. | |||
'''AMTOR''' : A specialised form of RTTY protocol. An acronym for AMateur Teleprinting Over Radio or AMateur Teletype over Radio. | |||
'''Analog''' (also analogue): a continuously varying signal. | '''Analog''' (also analogue): a continuously varying signal. | ||
'''ANC, ANR''' : Active noise control, active noise reduction. Also referred to as automatic noise cancellation or antinoise on some transceivers. | |||
'''[[Antennas | Antenna]]''': a device to either radiate radio signals or to receive them from another station. | '''[[Antennas | Antenna]]''': a device to either radiate radio signals or to receive them from another station. | ||
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'''Antenna Switch''' " A switch used to change the output of a transceiver from one [[Antennas | antenna]] to another. | '''Antenna Switch''' " A switch used to change the output of a transceiver from one [[Antennas | antenna]] to another. | ||
'''Antenna Tuner''' : A device used to match the output [[Impedance | impedance]] of a transmitter to that of an antenna | '''[[Antenna tuner | Antenna Tuner]]''' : A device used to match the output [[Impedance | impedance]] of a transmitter to that of an antenna. | ||
''' | '''Anti-VOX''' : Transceiver circuitry used in voice-operated (VOX) stations to prevent audio from the receiver's speaker from actuating the voice-operated transmitter. | ||
'''[[APRS]]''' : Automatic Position Reporting System, Automated Packet Reporting System. | '''[[APRS]]''' : Automatic Position Reporting System, Automated Packet Reporting System. | ||
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'''[[ARES]]''' : Amateur Radio Disaster Services, Amateur Radio Emergency Services | '''[[ARES]]''' : Amateur Radio Disaster Services, Amateur Radio Emergency Services | ||
'''ARRL''' : The American | '''[[ARRL]]''' : The American Radio Relay League [http://www.arrl.org/]- the national ham radio association for the USA | ||
'''[[ARISS]]''' : Amateur Radio on the International Space Station. A program that allows schools, with the help of an amateur club, to contact the amateur station on board the International space station. | '''[[ARISS]]''' : Amateur Radio on the International Space Station. A program that allows schools, with the help of an amateur club, to contact the amateur station on board the International space station. | ||
'''ASL''' : '''A'''bove '''S'''ea '''L'''evel. Vertical height in metres or feet above sea level. | |||
'''[[Attenuators | Attenuator]]''' : A resistive device to reduce the amplitude or power of a signal. | '''[[Attenuators | Attenuator]]''' : A resistive device to reduce the amplitude or power of a signal. | ||
'''ATS''' : Automatic Transfer Switch, switches equipment to a backup power supply in event of power failure. | |||
'''[[ATV]]''' : Amateur Television - "moving picture" ham TV transmissions. | '''[[ATV]]''' : Amateur Television - "moving picture" ham TV transmissions. | ||
'''Az/El''' : used to describe an antenna rotator that can change both the '''Az'''imuth (horizontal) and the ''' | '''Az/El''' : used to describe an antenna rotator that can change both the '''Az'''imuth (horizontal) and the '''E'''levation (vertical) direction of the antenna. | ||
'''Azimuth''' : The horizontal direction (angle) measured clockwise from North. | |||
{{operation}} | {{operation}} | ||
Latest revision as of 00:54, 2 April 2011
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Related wiki pages FAQ
When adding information to these pages, please link to other pages in the wiki wherever possible.
A
AC : Alternating Current
ADC : Analogue to Digital Converter. Also known as A/D and A-to-D. A device that samples an analogue wave and converts it into a digital signal, in which a series of numbers is used to represent the amplitude of the original wave.
ADIF : Amateur Data Interchange Format, a standard specification for format of exported logbook files.
Admittance : The reciprocal of impedance of a component in a series or parallel tuned circuit.
AF : Abbreviation for Audio Frequency. AF is in the range 20Hz to 20 000Hz
AFC : Automatic Frequency Control - used to prevent drift in FM receivers
AFSK : Audio Frequency Shift Keying.
AGC : Automatic Gain Control - a feedback system to reduce fading by automatically adjusting gain
AGL : (Height) Above Ground Level, for antenna installations.
ALC : Automatic Level Control - a feedback system in the transmitter output amplifier used to prevent overload.
Ampere :(A) The unit used for measurement of current. Usually abbreviated to Amps
Amplitude : the height of a wave from the average or median position.
AMSAT : The name for amateur radio satellite organizations world-wide, but in particular the Radio Amateur Satellite Corporation.
AM : Amlpitude Modulation
Amplifier : A device that is used to increase voltage, current or power.
AMTOR : A specialised form of RTTY protocol. An acronym for AMateur Teleprinting Over Radio or AMateur Teletype over Radio.
Analog (also analogue): a continuously varying signal.
ANC, ANR : Active noise control, active noise reduction. Also referred to as automatic noise cancellation or antinoise on some transceivers.
Antenna: a device to either radiate radio signals or to receive them from another station.
Antenna Switch " A switch used to change the output of a transceiver from one antenna to another.
Antenna Tuner : A device used to match the output impedance of a transmitter to that of an antenna.
Anti-VOX : Transceiver circuitry used in voice-operated (VOX) stations to prevent audio from the receiver's speaker from actuating the voice-operated transmitter.
APRS : Automatic Position Reporting System, Automated Packet Reporting System.
ARC : Amateur Radio Club (also ARA, ARS - Amateur Radio Association, Amateur Radio Society) - usually prefixed by the name of the community or region served
ARDF : Amateur Radio Direction Finding
ARES : Amateur Radio Disaster Services, Amateur Radio Emergency Services
ARRL : The American Radio Relay League [1]- the national ham radio association for the USA
ARISS : Amateur Radio on the International Space Station. A program that allows schools, with the help of an amateur club, to contact the amateur station on board the International space station.
ASL : Above Sea Level. Vertical height in metres or feet above sea level.
Attenuator : A resistive device to reduce the amplitude or power of a signal.
ATS : Automatic Transfer Switch, switches equipment to a backup power supply in event of power failure.
ATV : Amateur Television - "moving picture" ham TV transmissions.
Az/El : used to describe an antenna rotator that can change both the Azimuth (horizontal) and the Elevation (vertical) direction of the antenna.
Azimuth : The horizontal direction (angle) measured clockwise from North.
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