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

1. In radio communications systems, pertaining to a station that is completely shut down, i.e., that is not transmitting any signal, not even an un- modulated carrier wave.

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 may continue unmodulated or it may be modulated by another signal source.

Also, off-the-air may be synonymous with from-the-air, as in picking up a TV station off-the-air versus from cable TV.

1 See also

Dead air; jamming; fail safe

2 Reference

Federal Standard 1037C BroadcastingNote: broadcasting is also the old term for hand sowing. Broadcasting is the distribution of audio and video signals (programs) to a number of recipients ("listeners" or "viewers") that belong to a large group. This group may be the public in general, or Telecommunications

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