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.
Morse code is a character encoding scheme used in telecommunication that encodes text characters as standardized sequences of two different signal durations called dots and dashes or dits and dahs. Morse code is named for Samuel F. B. Morse, an inventor of the telegraph.
A quasar is an extremely luminous active galactic nucleus (AGN). It has been theorized that most large galaxies contain a supermassive central black hole with mass ranging from millions to billions of times the mass of our Sun. In quasars and other types of AGN, the black hole is surrounded by a gaseous accretion disk. As gas falls toward the black hole, energy is released in the form of electromagnetic radiation, which can be observed across the electromagnetic spectrum. The power radiated by quasars is enormous: the most powerful quasars have luminosities thousands of times greater than a galaxy such as the Milky Way.
The Canadian Broadcasting Corporation, branded as CBC/Radio-Canada, is a Canadian federal Crown corporation that serves as the national public broadcaster for both radio and television. The English- and French-language service units of the corporation are commonly known as CBC and Radio-Canada respectively, and both short-form names are also commonly used in the applicable language to refer to the corporation as a whole.
Cable-Satellite Public Affairs Network is an American cable and satellite television network that was created in 1979 by the cable television industry as a public service. C-SPAN televises many proceedings of the United States federal government, as well as other public affairs programming. The C-SPAN network includes three television channels, one radio station (WCSP-FM) and a group of websites that provide streaming media and archives of C-SPAN programs. C-SPAN's television channels are available to approximately 100 million cable and satellite households within the United States, while WCSP-FM, also called C-SPAN Radio, is broadcast on FM radio in Washington, D.C., and is available throughout the U.S. on XM Satellite Radio, via Internet streaming, and through apps for iOS, BlackBerry and Android devices.
Citizens band 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 band. Citizens band is distinct from other personal radio service allocations such as FRS, GMRS, MURS, UHF CB and the Amateur Radio Service. In many countries, CB operation does not require a license, and it may be used for business or 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. It is customary for stations waiting to use a shared channel to broadcast the single word "Break" followed by the channel number, during a lull in the conversation. This informs people using the channel that others are waiting.
BBC Radio 4 Extra is a British digital radio station broadcasting archived repeats of comedy, drama and documentary programmes nationally, 24 hours a day. It is the principal broadcaster of the BBC's spoken-word archive, and as a result the majority of its programming originates from that archive. It also broadcasts extended and companion programmes to those broadcast on sister station BBC Radio 4, and provides a "catch-up" service for certain Radio 4 programmes.
Call signs are frequently still used by North American broadcast stations, in addition to amateur radio and other international radio stations that continue to identify by call signs around the world. Each country has a different set of patterns for its own call signs. Call signs are allocated to ham radio stations in Barbados, Canada, Mexico and across the United States.
WYAY is a 77,000-watt Atlanta FM radio station that broadcasts a talk format. The station is currently owned and operated by Cumulus Media. Cumulus and Educational Media Foundation have entered into an agreement for EMF to purchase WYAY, along with several other stations in other markets, for $103.5 million. EMF will begin operating WYAY upon the sale's closure in the summer of 2019. Its city of license is Gainesville, Georgia, northeast of Atlanta, but the station moved in toward the metro area in early 1985.
Soft rock is a derivative form of pop rock that originated in the early 1970s in southern California. The style smoothed over the edges of singer-songwriter and pop rock, relying on simple, melodic songs with big, lush productions. Soft rock was prevalent on the radio throughout the 1970s and eventually metamorphosed into the synthesized music of adult contemporary in the 1980s.
Rádio e Televisão de Portugal is the public service broadcasting organisation of Portugal. It operates four national television channels and three national radio channels, as well as several satellite and cable offerings.
WJFK-FM is a commercial radio station licensed to Manassas, Virginia, and serving the Washington metropolitan area. WJFK-FM airs a sports radio format and is owned and operated by Entercom.
WJFK-FM's studios are on Half Street SE near the Navy Yard in Southeast Washington. The transmitter is located in Falls Church, Virginia, near the intersection of Lee Highway and the Capital Beltway.
"My Funny Valentine" is a show tune from the 1937 Richard Rodgers and Lorenz Hart musical Babes in Arms in which it was introduced by former child star Mitzi Green. The song became a popular jazz standard, appearing on over 1300 albums performed by over 600 artists. In 2015 it was announced that the Gerry Mulligan quartet featuring Chet Baker's version of the song was inducted into the Library of Congress's National Recording Registry for the song's "cultural, artistic and/or historical significance to American society and the nation’s audio legacy". Mulligan also recorded the song with his Concert Jazz Band in 1960.
In broadcasting and radio communications, a call sign is a unique designation for a transmitter station. In the United States of America, they are used for all FCC-licensed transmitters. A call sign can be formally assigned by a government agency, informally adopted by individuals or organizations, or even cryptographically encoded to disguise a station's identity.
WOMX-FM is a commercial radio station licensed to Orlando, Florida. The station is owned by Entercom and airs a Hot Adult Contemporary radio format known as Mix 105.1. WOMX-FM's studios and offices are located on Pembrook Drive in Maitland and the transmitter tower is off Fort Christmas Road in Bithlo.
WDCH-FM is a radio station currently broadcasting a business news format to the Baltimore, Maryland/Washington, D.C. metropolitan area. Licensed to Bowie, Maryland the station is currently owned by Entercom and operated by Bloomberg L.P. Its transmitter is located near Crofton, Maryland, and the broadcasting studios are located near the Washington Navy Yard along the north/west bank of the Anacostia River in Southeast Washington.
ISO/IEC 18000 is an international standard that describes a series of diverse RFID technologies, each using a unique frequency range.
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. The term "amateur" is used to specify "a duly authorised person interested in radioelectric practice with a purely personal aim and without pecuniary interest;" and to differentiate it from commercial broadcasting, public safety, or professional two-way radio services.
National Public Radio is an American privately and publicly funded non-profit membership media organization based in Washington, D.C. NPR differs from other non-profit membership media organizations, such as AP, in that it was established by an act of Congress and most of its member stations are owned by government entities. It serves as a national syndicator to a network of over 1,000 public radio stations in the United States.
The C band is a designation by the Institute of Electrical and Electronics Engineers (IEEE) for a portion of the electromagnetic spectrum in the microwave range of frequencies ranging from 4.0 to 8.0 gigahertz (GHz); however, this definition is the one used by radar manufacturers and users, not necessarily by microwave radio telecommunications users. The C band is used for many satellite communications transmissions, some Wi-Fi devices, some cordless telephones as well as some surveillance and weather radar systems.
