Off-the-air

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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 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

• Dead air
• Jamming
• Fail safe

References

• Federal Standard 1037Cja:停波