Terrestrial television

Terrestrial television delivers television signals over radio waves from land-based transmitters to receiving antennas. It does not depend on cable, satellite, or internet networks.

Television transmitter: A station facility that converts television programming into radio-frequency signals for broadcast. It launches the signals that terrestrial television receivers capture.
Electromagnetic radiation: Energy propagated through space as coupled electric and magnetic fields. Television broadcasts are electromagnetic waves traveling from transmitters to antennas.
John Logie Baird: A Scottish inventor who demonstrated early mechanical television systems in the 1920s. His demonstrations helped establish television broadcasting as a practical medium.
Cable television: Television delivered to subscribers through coaxial or fiber-optic networks. Cable carries signals over a wired network rather than an open-air broadcast.
Broadcast television: Television programming distributed from transmitters to receivers for simultaneous reception by the public. Terrestrial television is a major form of broadcast television.
Broadcast antenna: A structure that radiates or receives electromagnetic waves for communication. Its placement and design shape terrestrial signals' coverage and direction.
Radio frequency: A frequency within the portion of the electromagnetic spectrum used for radio communication. Broadcast channels are assigned radio frequencies that receivers tune to.
BBC Television Service: The world's first regularly scheduled high-definition television service, launched in Britain in 1936. Its launch marks an early transition from television experiments to regular broadcasts.
Satellite television: Television programming relayed from satellites to receiving dishes. Satellite coverage reaches areas beyond terrestrial transmitters but requires a dish.
Digital terrestrial television: Digital television broadcast from terrestrial transmitters to receiving antennas. It is the modern digital form of the transmission system described here.

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Digital Terrestrial Multimedia BroadcastNarrower topic: DTMB specifies how digital television is delivered through terrestrial transmitters.