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  2. Sign-on and sign-off - Wikipedia

    en.wikipedia.org/wiki/Sign-on_and_sign-off

    Some broadcasters that have ceased signing on and signing off in favour of 24-hour broadcasting may perform a sign-off sequence at a certain time in the night (usually between 10:00 p.m. and 1:00 a.m.) as a formality to signify the end of its operating day (in the United States, the broadcast logging day ends at 12:00 midnight local time).

  3. Television closedown routines in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/Television_closedown...

    Channel 4 was the only TV station to show the testcard at closedown as the BBC just radiated tone for ten minutes after closedown before the transmitters were switched off for the night. Channel 4 (which, at launch in 1982, was usually closed for around sixteen hours a day) began its 24-hour service on 6 January 1997, after a year of gradually ...

  4. List of defunct television networks in the United States

    en.wikipedia.org/wiki/List_of_defunct_television...

    Twelve-hour channel started in 1994; precursor to ZDTV. Mojo HD: Comcast/Cox Communications/Time Warner Cable: December 1, 2008: Launched in September 2003. Formerly known as INHD. MET TV - USA MET Network November 23, 2023 Launched on 28 December 1966. National Jewish Television Network: Joel Levitch Basic cable channel broadcasting from New ...

  5. 24 (TV series) - Wikipedia

    en.wikipedia.org/wiki/24_(TV_series)

    The series is set four years after the events of season 8, and adheres to the original real time concept: The main plot is set between 11:00 a.m. and 10:50 p.m., with each episode corresponding to an hour; however, the concluding episode's final part features a 12-hour time jump enabling the show to join up the full 24 hour period back to 11:00 ...

  6. The original VJs look back, 40 years later: 'The first 24 ...

    www.aol.com/entertainment/original-vjs-look-back...

    The first 24 hours of MTV were held together by duct tape. It was so seat-of-the-pants, it was scary. Mark: That was the thing about MTV, completely, at the beginning: Nobody knew nothing.

  7. Timeline of overnight broadcasting in the UK - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_overnight...

    3 October – Ulster begins 24 hour broadcasting. [9] Ulster had planned to commence 24-hour transmissions a month earlier but it was delayed because of a last minute decision to take the overnight service provided by Granada and not that provided by Central. This means that, from this day, all ITV regions now offer a 24-hour service.

  8. Test card - Wikipedia

    en.wikipedia.org/wiki/Test_card

    A test card, also known as a test pattern or start-up/closedown test, is a television test signal, typically broadcast at times when the transmitter is active but no program is being broadcast (often at sign-on and sign-off). [1] Used since the earliest TV broadcasts, test cards were originally physical cards at which a television camera was ...

  9. Television in the United States - Wikipedia

    en.wikipedia.org/wiki/Television_in_the_United...

    Rather than sign off in the early pre-dawn hours of the morning (as was standard practice until the early 1970s in larger markets and until the mid-1980s in smaller ones), television stations now fill the time with syndicated programming, reruns of prime time television shows or late local newscasts (the latter becoming less common since the ...