Editing Studio transmitter link (section)

==Link==
This is often necessary because the best locations for an [[antenna (electronics)|antenna]] are on top of a mountain, where a much shorter [[radio tower]] is required, but where locating a studio may be impractical.  Even in flat regions, the center of the station's allowed coverage area may not be near the studio location or may lie within a populated area where a transmitter would be [[NIMBY|frowned upon by the community]], so the antenna must be placed at a distance from the studio.

Depending on the locations that must be connected, a station may choose either a [[point-to-point (telecommunications)|point to point]] (PTP) link on another special [[radio frequency]], or a newer all-[[digital signal (broadcasting)|digital]] wired link via a dedicated [[data transmission circuit]].  Radio links can also be digital, or the older [[analog signal|analog]] type, or a [[in-band on-channel|hybrid]] of the two.  Even on older all-analog systems, multiple audio and data channels can be sent using [[subcarrier]]s.

Stations that employ an STL usually also have a ''transmitter/studio link'' (TSL) to return [[telemetry]] information.  Both the STL and TSL are considered [[broadcast auxiliary service]]s (BAS).