The original inventors of radio, from Guglielmo Marconi's time on, expected it to be used for one-on-one wireless communication tasks where telephones and telegraphs could not be used because of the problems involved in stringing copper wires from one point to another, such as in ship-to-shore communications. Those inventors had no expectations whatever that radio would become a major mass media entertainment and information medium earning many millions of dollars in revenues annually through radio advertising commercials or sponsorship. These latter uses were brought about after 1920 by business entrepreneurs such as David Sarnoff, who created the National Broadcasting Company (NBC), and William S. Paley, who built Columbia Broadcasting System (CBS). These broadcasting (as opposed to narrowcasting) business organizations began to be called network affiliates, because they consisted of loose chains of individual stations located in various cities, all transmitting the standard overall-system supplied fare, often at synchronized agreed-upon times. Some of these radio network stations were owned and operated by the networks, while others were independent radio owned by entrepreneurs allied with the respective networks. By selling blocks of time to advertisers, the medium was able to quickly become profitable and offer its products to listeners for free, provided they invested in a radio receiver set.
The new medium had grown rapidly through the 1930s, vastly increasing both the size of its audience and its profits. In those early days, it was customary for a corporation to sponsor an entire half-hour radio program, placing its commercials at the beginning and the end. This is in contrast to the pattern which developed late in the 20th century in both television and radio, where small slices of time were sold to many sponsors and no corporation claimed or wanted sponsorship of the entire show, except in rare cases. These later commercials also filled a much larger portion of the total program time than they had in the earlier days.
In the early radio age, content typically included a balance of comedy, drama, news, music and sports reporting. Variety radio programs included the most famous Hollywood talent of the day. During the 1920s, radio focused on musical entertainment, the Grand Ole Opry, has been focused on broadcasting country music since it began in 1925. Radio soap operas began in the U.S. in 1930 with Painted Dreams. Lørdagsbarnetimen, a Norwegian children's show, with its premiere in 1924 interrupted only by the Second World War, was the longest running radio show in the world until it ceased production in 2010.[1]
CHIRP is a free, open-source tool for programming your radio. It supports a large number of manufacturers and models, as well as provides a way to interface with multiple data sources and formats.
NOTE 2: Not all functionality is supported on all radio models. Not all models and variants are listed here. For a more complete view of everything supported, as well as which features are supported for which model, take a look at overview of supported features for the latest build.
Climate Connections is heard on more than 700 public, university, community, and alternative radio frequencies, and internationally on a handful of English-language stations (see Story Locations, Stations Map). The 90-second segments also are available wherever you get your podcasts.
This Manual is published by the Federal Communications Commission (FCC), the federal agency directed by Congress to regulate broadcasting. It provides a brief overview of the regulation of broadcast radio and television licensees, describing how the FCC authorizes broadcast stations, the various rules relating to broadcast programming and operations that stations must comply with, and the essential obligation of licensees that their stations serve their local communities.
Commercial and Noncommercial Educational Stations. The FCC licenses FM radio and full power TV stations as either commercial or noncommercial educational (NCE). (Most AM radio stations are licensed as commercial facilities.) Class A television, low power television and television translator stations are neither designated commercial or NCE. Commercial stations usually support themselves through the sale of advertising. In contrast, NCE stations generally meet their operating expenses with contributions received from listeners and viewers, and also may receive government funding. In addition, NCE stations may receive contributions from for-profit entities and are permitted to acknowledge these contributions or underwriting donations with announcements naming and generally describing the contributing party or donor. However, NCE stations cannot broadcast commercials or other promotional announcements on behalf of for-profit entities. The limitations on NCE stations are discussed further in this Manual.
Digital Radio. The FCC also approved digital operation for AM and FM radio broadcast stations (HD radio). As with DTV, digital radio substantially improves the quality of the radio signal and allows a station to offer multicasting over several programming streams, as well as certain enhanced services. Unlike the mandatory digital transition deadline for television stations, radio stations can continue to operate in analog and have discretion whether also to transmit in digital and, if so, when to begin operating digitally. To receive the digital signals of stations that choose to operate in digital, consumers will have to purchase new receivers.
Because digital radio technology allows a radio station to transmit simultaneously in both analog and digital, listeners can use their current radios to receive the analog signals of radio stations that transmit both analog and digital signals. Receivers are being marketed that incorporate both modes of reception, with the ability to automatically switch to the analog signal if the digital signal cannot be detected or is lost by the receiver. For additional information about digital radio, see -radio.
Broadcast licenses generally expire on a staggered basis, by state, with most radio licenses expiring between October 1, 2019, and August 1, 2022, and most television licenses expiring between October 1, 2020, and August 1, 2023, one year after the radio licenses in the same state. Before you file a petition to deny an application, you should check our rules and policies to make sure that your petition complies with our procedural requirements. For a more complete description of these procedures and requirements, see -television-license-renewal for television for television, and https:www.fcc.gov/media/radio/broadcast-radio-license-renewal for radio. Alternatively, you can also file an informal objection, which has fewer procedural requirements, often takes the form of a simple letter, and will be considered if received at any time before we either grant or deny the application. Instructions for filing informal objections can be found at -informal-complaint.
In 1999, the Supreme Court held that the prohibition on broadcasting advertisements for lawful casino gambling could not constitutionally be applied to truthful advertisements broadcast by radio or television stations licensed in states where gambling is legal. Relying upon the reasoning in that decision, the FCC and the United States Department of Justice later concluded that the lottery advertising prohibition may not constitutionally be applied to the broadcast of any truthful advertisements for lawful casino gambling, whether or not the state in which the broadcasting station is located permits casino gambling. For additional information about the rule concerning lotteries, see -contests-lotteries-and-solicitation-funds.
Closed Captioning. Closed captioning is a technology designed to provide access to television programming by persons with hearing disabilities by displaying, in text form, the audio portion of a broadcast, as well as descriptions of background noise and sound effects. Closed captioning is hidden as encoded data transmitted within the television signal. A viewer wanting to see the captions must use a set-top decoder or a television with built-in decoder circuitry. All television sets with screens 13 inches or larger manufactured since mid-1993, including digital sets, have built-in decoder circuitry.
Similarly, if the emergency information is presented visually, it must be made accessible for persons who are blind or visually impaired. If the emergency information is provided in the video portion of a regularly scheduled newscast or a newscast that interrupts regular programming, it must be made accessible through an aural description of the emergency information. If the emergency information is provided visually during regular programming, such as through a screen crawl or scroll, the visual information must be accompanied with an aural tone to alert persons with visual disabilities that the station is providing this information, and that they should tune to the secondary audio stream where such information must be provided aurally. Additional information concerning this requirement can be found on the FCC's website at Accessibility of Emergency Information on Television.
Apparatus Requirements for Emergency Information and Video Description. The FCC requires certain apparatus that receive, play back, or record video programming to make available a secondary audio stream for providing video description services and accessible emergency information. Manufacturers of apparatus must provide a simple and easy to use mechanism for activating the secondary audio stream, such as a button or icon. For additional information concerning this requirement, see -and-set-top-box-controls-menus-program-guides.
Accessible User Interfaces. Certain digital devices must make built-in functions that are used to receive, play back, or display programs accessible to people who are blind or visually impaired. These devices must include a simple and easy to use mechanism for accessing closed captioning and video description. Additionally, certain navigation devices must make on-screen text menus and guides used for the display or selection of video programming audibly accessible to people who are blind or visually impaired. These devices must include a simple and easy to use mechanism for accessing closed captioning. For additional information concerning this requirement, see -and-set-top-box-controls-menus-program-guides.
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