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Off-air




# 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 . 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 permanenently; while "off-the-air" is generally used for a brief period of time, or for a station that has recently stopped broadcasting.
# 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 Synonym ous 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.


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