Broadcast auxiliary service

Broadcast auxiliary service

A broadcast auxiliary service or BAS is any radio frequency system used by a radio station or TV station, which is not part of its direct broadcast to listeners or viewers. These are essentially internal-use channels not intended for actual reception by the public, but required to get those signals to such a transmitter.

Examples include:
*studio/transmitter link (STL)
*transmitter/studio link (TSL)
*remote pickup unit (RPU)
*electronic news gathering (ENG)

Relocation

In the United States, the FCC is moving the 2GHz TV BAS band. This was done at the request of Sprint Nextel, so that it could use the current BAS band, which is adjacent to PCS frequencies it already uses. The report and order resulting from this rulemaking specifies that Sprint/Nextel must pay for every TV station in the country to buy and install new BAS equipment to equally replace what they have noe (although not every station uses BAS).

Previously, there were seven analog TV channels, each 17 or 18MHz wide, between 1990 and 2110MHz. There are now seven new digital TV channels, each 12MHz wide, from 2025 to 2110MHz. There is also a "narrowed in place" bandplan used as an interim measure, as the two bands overlap. The relocation is 94% complete as of October 2008, and is expected to be fully complete in mid-2009. The cleared band will then be used for PCS, AWS, and MSS services. [http://www.2ghzrelocation.com]


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