37 relations: Alaska, Amateur radio, Amateur radio frequency allocations, Amateur radio operator, Amateur radio satellite, Amateur radio station, American Radio Relay League, Amplitude modulation, Continuous wave, DX Century Club, Earth–Moon–Earth communication, Frequency modulation, Hawaii, High frequency, Logbook of The World, Maryland, Modulation, Olivia MFSK, Packet radio, PSK31, QRP operation, QSL card, QST, Radiotelephone, Radioteletype, Single-sideband modulation, Slow-scan television, Two-way communication, United States, Washington, D.C., World War II, WSJT (amateur radio software), 1.25-meter band, 160-meter band, 2-meter band, 6-meter band, 70-centimeter band.
Alaska (Alax̂sxax̂) is a U.S. state located in the northwest extremity of North America.
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.
Amateur radio frequency allocation is done by national telecommunications authorities.
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.
An amateur radio satellite is an artificial satellite built and used by amateur radio operators for use in the Amateur-satellite service.
An amateur radio station is a radio station designed to provide radiocommunications in the amateur radio service for an amateur radio operator.
The American Radio Relay League (ARRL) is the largest membership association of amateur radio enthusiasts in the USA.
Amplitude modulation (AM) is a modulation technique used in electronic communication, most commonly for transmitting information via a radio carrier 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.
The DX Century Club, or DXCC, is an amateur radio operating award earned by making contacts with licensed amateur operators in at least 100 "countries" (i.e. geographic locations listed in the rules for the award) around the world, many of which are physically distant from the claimant (i.e.DX).
Earth–Moon–Earth communication (EME), also known as moon bounce, is a radio communications technique that relies on the propagation of radio waves from an Earth-based transmitter directed via reflection from the surface of the Moon back to an Earth-based receiver.
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.
Hawaii (Hawaii) is the 50th and most recent state to have joined the United States, having received statehood on August 21, 1959.
High frequency (HF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) between 3 and 30 megahertz (MHz).
Logbook of the World (LoTW) is a web-accessed database provided by the American Radio Relay League (ARRL) to implement a contact verification service among amateur radio operators.
Maryland is a state in the Mid-Atlantic region of the United States, bordering Virginia, West Virginia, and Washington, D.C. to its south and west; Pennsylvania to its north; and Delaware to its east.
In electronics and telecommunications, modulation is the process of varying one or more properties of a periodic waveform, called the carrier signal, with a modulating signal that typically contains information to be transmitted.
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.
Packet radio is a form of packet switching technology used to transmit digital data via wireless communications.
PSK31 or "Phase Shift Keying, 31 Baud", also BPSK31 and QPSK31, is a popular computer-sound card-generated radioteletype mode, used primarily by amateur radio operators to conduct real-time keyboard-to-keyboard chat, most often using frequencies in the high frequency amateur radio bands (near-shortwave).
In amateur radio, QRP operation refers to transmitting at reduced power while attempting to maximize one's effective range.
A QSL card is a written confirmation of either a two-way radiocommunication between two amateur radio stations or a one-way reception of a signal from an AM radio, FM radio, television or shortwave broadcasting station.
QST is a magazine for amateur radio enthusiasts, published by the American Radio Relay League (ARRL).
A radiotelephone (or radiophone) is a communications system for transmission of speech over radio.
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.
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.
Slow Scan television (SSTV) is a picture transmission method used mainly by amateur radio operators, to transmit and receive static pictures via radio in monochrome or color.
Two-way communication is a form of transmission in which both parties involved transmit information.
The United States of America (USA), commonly known as the United States (U.S.) or America, is a federal republic composed of 50 states, a federal district, five major self-governing territories, and various possessions.
Washington, D.C., formally the District of Columbia and commonly referred to as Washington or D.C., is the capital of the United States of America.
World War II (often abbreviated to WWII or WW2), also known as the Second World War, was a global war that lasted from 1939 to 1945, although conflicts reflecting the ideological clash between what would become the Allied and Axis blocs began earlier.
WSJT is a computer program used for weak-signal radio communication between amateur radio operators.
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.
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.
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).
The 6-meter band is the lowest portion of the very high frequency (VHF) radio spectrum allocated to amateur radio use.
The 70-centimeter or 440 MHz band is a portion of the UHF radio spectrum internationally allocated to amateur radio and amateur satellite use.