In telecommunication, the term off-air or off-the-air has the following meanings:

  1. In radio communications systems, pertaining to a radio station or television station that is completely shut down, i.e. that is not transmitting any signal, not even an un-modulated carrier wave. Other terms in this context include "dark" or "silent", though those terms were typically used for a station that has left the air for an extended period of time, or permanently; while "off-the-air" is generally used for a brief period of time, or for a station that has recently stopped broadcasting.
  2. In a radio station, pertaining to a particular source of modulation, such as a specific microphone, that is disconnected, i.e. is no longer capable of modulating the carrier.

Note: The carrier wave may continue unmodulated or it may be modulated by another signal source, such as a subcarrier.

Also, off-the-air may be synonymous with over-the-air or from-the-air, as in picking up a terrestrial broadcast TV station off-the-air instead of from cable TV. As this usage may be confusing due to the term's other meanings, the terms "over the air" or "on the air" are more standard in the broadcasting industry.

See also


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Look at other dictionaries:

  • off the air — Not broadcasting or being broadcast for a period of time • • • Main Entry: ↑air * * * off the air of a radio or television station, program, etc. : not being broadcast The station is now off the air. They took him off the air because of his… …   Useful english dictionary

  • off (the) air — phrase no longer broadcasting on radio or television After just three episodes the series was taken off the air. Wait till we’re off air (=have stopped being broadcast) . Thesaurus: relating to television or radiohyponym well known television and …   Useful english dictionary

  • off the air — 1. not broadcasting. The radio station went off the air at midnight. 2. not being broadcast. Many people were angry when they heard the program was off the air …   New idioms dictionary

  • off the air — ► on (or off) the air being (or not being) broadcast on radio or television. Main Entry: ↑air …   English terms dictionary

  • off the air — {adj. phr.} Not broadcasting; observing radio silence. * /The talk show is off the air on Wednesdays and Fridays./ …   Dictionary of American idioms

  • off\ the\ air — adj. phr. Not broadcasting; observing radio silence. The talk show is off the air on Wednesdays and Fridays …   Словарь американских идиом

  • Off the air — crazy; very angry …   Dictionary of Australian slang

  • off the air — Australian Slang crazy; very angry …   English dialects glossary

  • off the air — idi not broadcasting or being broadcast …   From formal English to slang

  • Off the Air (TV series) — Off the Air Promotional image for Off the Air Format Alternative Created by Dave Hughes …   Wikipedia

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