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===Licensing and on-air identity===
While becoming less meaningful over the decades, stations are still required to post a [[public file]] somewhere within 25 miles of the city, and to cover the entire city with a local [[Signaling (telecommunications)|signal]]. In the United States, a station's [[transmitter]] must be located so that it can provide a strong signal over nearly all of its "principal community" (5 mV/m or stronger at night for AM stations, 70 dbuV for FM, 35 dbu for DTV channels 2–6, 43 dbu for channels 7-13 and 48 dbu for channels 14+), even if it primarily serves another city.<ref>FCC Rules §73.24, §73.315 and §73.625</ref> For example, American television station [[WTTV]] primarily serves [[Indianapolis]]; however, the transmitter is located farther south than the other stations in that city because it is licensed to [[Bloomington, Indiana|Bloomington]], 50 miles south of Indianapolis (it maintains a satellite station, WTTK, licensed to [[Kokomo, Indiana]], but in the digital age, WTTK is for all intents and purposes the station's main signal, transmitting from the traditional Indianapolis transmitter site). In some cases, such as [[Jeannette, Pennsylvania]]-licensed [[
FCC regulations also require stations at least once an hour to state the station's call letters, followed by the city of license. However, the FCC has no restrictions on additional names after the city of license, so many stations afterwards add the nearest large city. For example, CBS affiliate [[WOIO]] is licensed to [[Shaker Heights, Ohio|Shaker Heights]], a suburb of [[Cleveland]], and thus identifies as "WOIO Shaker Heights-Cleveland." Similarly, northern [[New York (state)|New York]]'s [[WWNY-TV]] (also a CBS affiliate) identifies as "WWNY-TV [[North American broadcast television frequencies|7]] [[Carthage, New York|Carthage]]-[[Watertown, New York|Watertown]]" as a historical artifact; the original broadcasts originated from [[Champion, New York|Champion Hill]] in 1954 so the license still reflects this tiny location.{{efn|It is possible for two stations to have the same studio location and transmit from the same mast at the same site, but be licensed to different communities; [[WWNY-TV]] and [[WNYF-CD]] (Carthage and Watertown NY, respectively) are one example.}}
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||[[NBC]] programming traditionally had been carried by [[KRON-TV]] 4, a San Francisco affiliate which NBC had unsuccessfully attempted to purchase outright for [[United States dollar|$]]750 million in 1999. Outbid by an outside buyer, NBC attempted to force the new owners to rebrand the station as "NBC 4" and greatly restrict the station's ability to schedule its programming differently from the main network. The new owners refused. NBC purchased the San Jose station for $230 million in 2001,<ref>[http://www.bizjournals.com/sanjose/stories/2001/12/17/daily1.html NBC to buy San Jose's KNTV, Silicon Valley / San Jose Business Journal, December 17, 2001]</ref> moving their network programming on January 1, 2002, and relocating KNTV's transmitters to [[San Bruno Mountain]] on September 12, 2005, over KRON's objections. The station's license and newly built studios remain in San Jose and the station has well-lapped KRON-TV, which is now affiliated with [[MyNetworkTV]] and shares a building with ABC's [[KGO-TV]].
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||Originally a [[Johnstown, Pennsylvania|Johnstown]] station, one of the rare instances in which the community of license for an existing channel has successfully been changed.
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||[[WPWR-TV]] 50 [[MyNetworkTV]]
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