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All US digital stations received a -DT suffix during the analog-to-digital transition. At analog shutdown, the FCC assigned to each digital station the call sign its associated analog station had used. (with a -TV suffix if the analog station had this suffix, without the -TV suffix if the analog station didn't have it).
Learn about digital subchannels, a method of transmitting multiple programs from the same radio or TV station on the same frequency. Find out how they work, what they are called, and how they are used in different countries.
Learn about the history, standards, and reception of digital terrestrial television (DTT) in the U.S., which uses the ATSC format and offers HD signals and subchannels. Find out how the FCC mandated the transition from analog to digital broadcasting by 2009 and approved ATSC 3.0 in 2017.
A broadcast license is a permission to use a portion of the radio frequency spectrum for broadcasting purposes. Learn about the different types of licenses, how they are issued and managed, and the economic and technical aspects of spectrum allocation.
Learn about the switchover from analog to digital broadcasting of terrestrial television programming in the U.S., which was completed by January 10, 2022. Find out the history, timeline, challenges and benefits of the transition, and how it affected consumers and broadcasters.
The class A television service is a system for regulating some low-power television stations in the United States.Class A stations are denoted by the broadcast callsign suffix "-CA" (analog) or "-CD" (digital), although very many analog -CA stations have a digital companion channel that was assigned the -LD suffix used by regular (non-class-A) digital LPTV stations.
The FCC is a U.S. agency that regulates communications by radio, television, wire, satellite, and cable. It has five commissioners, seven bureaus, and twelve offices, and its mission is to make available rapid, efficient, and nationwide communication services.
Learn about the history, categories and ownership of the major commercial, Spanish-language, non-commercial and shopping networks in the United States. See the table of networks with their launch dates, household reach, affiliates and languages.
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