# Frequency sharing

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{{Short description|Use of the same radio frequency by two or more broadcast licensees}}

In [telecommunications](/source/telecommunications), '''frequency sharing''' or '''channel sharing''' is the assignment to or use of the same [radio frequency](/source/radio_frequency) by two or more stations that are separated geographically or that use the frequency at different times. It reduces the potential for mutual [interference](/source/radio_frequency_interference) where the assignment of different frequencies to each [user](/source/User_(telecommunications)) is not practical or possible.

==Channel sharing in digital television==
U.S. mobile data usage in 2017 was 40 times that in 2010, forcing frequencies to be reallocated.<ref>{{cite web |title=As cellphones gobble bandwidth, TV stations change frequencies |url=https://altamontenterprise.com/07222019/cellphones-gobble-bandwidth-tv-stations-change-frequencies |website=The Altamont Enterprise |location=Albany County, New York |language=en |date=July 22, 2019}}</ref><ref>{{cite web |title=The State of Wireless 2018 Report |url=https://www.ctia.org/news/the-state-of-wireless-2018 |website=[CTIA](/source/CTIA_(organization)) |access-date=18 August 2020 |language=en}}</ref><ref>https://docs.fcc.gov/public/attachments/DOC-355217A1.pdf<!-- #page=14 --></ref> The [FCC's 2016 auction](/source/2016_United_States_wireless_spectrum_auction) allowed two or more stations to share a single 6&nbsp;MHz television channel while retaining their licenses and all rights.<ref>{{cite web |last1=Oxenford |first1=David |title=FCC Adopts New Rules for Post-Incentive Auction Channel Sharing – Including Opportunities for LPTV and TV Translators to Increase Over-the-Air Coverage |url=https://www.broadcastlawblog.com/2017/03/articles/fcc-adopts-new-rules-for-post-incentive-auction-channel-sharing-including-opportunities-for-lptv-and-tv-translators-to-increase-over-the-air-coverage/ |website=Broadcast Law Blog |publisher=David Oxenford |access-date=18 August 2020 |date=24 March 2017}}</ref><ref>{{cite web |title=FCC Expands Channel Sharing Opportunities for Broadcasters |url=https://transition.fcc.gov/Daily_Releases/Daily_Business/2017/db0323/DOC-344040A1.pdf |website=transition.fcc.gov |publisher=FC news |archive-url=https://web.archive.org/web/20250722041313/https://transition.fcc.gov/Daily_Releases/Daily_Business/2017/db0323/DOC-344040A1.pdf |archive-date=2025-07-22 |language=en |date=23 March 2017 |url-status=live}}</ref><ref>{{cite web |title=Expanding the Economic and Innovation Opportunities of Spectrum Through Incentive Auctions |url=https://apps.fcc.gov/edocs_public/attachmatch/FCC-17-29A1.pdf |publisher=Federal Communications Commission |archive-url=https://web.archive.org/web/20250722041401/https://docs.fcc.gov/public/attachments/FCC-17-29A1.pdf |archive-date=2025-07-22 |date=March 23, 2017 |url-status=live}}</ref>

NBC sold the spectrum of three of its stations in the 2017 FCC auction: [WNBC](/source/WNBC) New York, Telemundo [WSNS-TV](/source/WSNS-TV) Chicago and [WWSI](/source/WWSI) Philadelphia. Other NBC stations in the market would begin channel sharing with those stations; for instance, Comcast moved Channel 28 WNBC onto Telemundo's Channel 35 WNJU, broadcasting both stations from WNJU's antenna.<ref>{{cite web |title=FCC Broadcast Television Spectrum Incentive Auction Auction 1001 Winning Bids |url=https://apps.fcc.gov/edocs_public/attachmatch/DA-17-314A2.pdf |archive-url=https://ghostarchive.org/archive/20221009/https://apps.fcc.gov/edocs_public/attachmatch/DA-17-314A2.pdf |archive-date=2022-10-09 |url-status=live |website=fcc.gov |access-date=18 August 2020 |date=2017-04-04}}</ref><ref>{{cite web |title=NBC Makes Over $480 Million From Auction |url=https://tvnewscheck.com/article/103245/nbc-makes-over-480-million-from-auction/ |website=TV News Check |access-date=18 August 2020 |language=en |date=13 April 2017}}</ref><ref>{{cite web |last1=Newman |first1=Jared |title=What cord-cutting TV antenna users need to know about the FCC's spectrum auction |url=https://www.techhive.com/article/3191089/what-cord-cutting-tv-antenna-users-need-to-know-about-the-fccs-spectrum-auction.html |website=TechHive |access-date=18 August 2020 |language=en |date=20 April 2017}}</ref><ref>{{cite web |last1=Sanders |first1=Scott |title=WYCC may have sold for up to $130 million less than it is worth |url=https://reelchicago.com/article/wycc-sold-100-million-less-worth/ |website=Reel Chicago |access-date=18 August 2020 |date=27 November 2017}}</ref> Stations had to either channel-share with another TV station in this way or go off the air by Jan. 23, 2018.<ref>{{cite web |last1=Channick |first1=Robert |title=Chicago PBS station WYCC hoping to stay on the air through deal with WTTW |url=https://www.chicagotribune.com/business/ct-biz-wycc-tv-channel-sharing-20170922-story.html |website=Chicago Tribune |access-date=18 August 2020 |date=2017-09-22}}</ref>

==References==
{{Reflist}}

== External links ==
* {{cite web |author1=Federal Communications Commission |author-link=Federal Communications Commission |title=Channel Sharing Workshop |url=https://www.youtube.com/watch?v=DzzJBftiaW4  |archive-url=https://ghostarchive.org/varchive/youtube/20211211/DzzJBftiaW4| archive-date=2021-12-11 |url-status=live|publisher=[YouTube](/source/YouTube) |access-date=18 August 2020 |date=May 22, 2012}}{{cbignore}}
:*{{cite web |title=Channel Sharing Workshop |url=https://www.fcc.gov/news-events/events/2012/05/channel-sharing-workshop |publisher=Federal Communications Commission |access-date=18 August 2020 |language=en |date=1 May 2012}}

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Category:Bandplans

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Adapted from the Wikipedia article [Frequency sharing](https://en.wikipedia.org/wiki/Frequency_sharing) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Frequency_sharing?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.