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It is the opposite of a sign-off (or closedown in Commonwealth countries except Canada), which is the sequence of operations involved when a radio or television station shuts down its transmitters and goes off the air for a predetermined period; generally, this occurs during the overnight hours although a broadcaster's digital specialty or sub ...
Test cards typically contain a set of patterns to enable television cameras and receivers to be adjusted to show the picture correctly (see SMPTE color bars).Most modern test cards include a set of calibrated color bars which will produce a characteristic pattern of "dot landings" on a vectorscope, allowing chroma and tint to be precisely adjusted between generations of videotape or network feeds.
The tube has a perfectly proportioned copy of the test pattern master art (or a modified variant with the station ID replacing the Indian-head portrait, such as those used by KRLD-TV, [2] WBAP-TV [3] and WKY-TV [4]) inside, permanently deposited as a carbon image on an aluminum target plate or slide.
[[Category:Television templates]] to the <includeonly> section at the bottom of that page. Otherwise, add <noinclude>[[Category:Television templates]]</noinclude> to the end of the template code, making sure it starts on the same line as the code's last character.
Infobox for broadcast television stations Template parameters [Edit template data] This template prefers block formatting of parameters. Parameter Description Type Status Name name Name of television station, often the call sign Line suggested Call sign callsign The call letters of the station, as assigned by the appropriate national broadcast authority. Note: If the licensing authority is the ...
Off-air screen capture of BBC Test Card F, as seen on BBC1 between 17 February 1991 and 4 October 1997. Test Card F is a test card that was created by the BBC and used on television in the United Kingdom and in countries elsewhere in the world for more than four decades.
If this template is used without any parameters in the format, {{Channel Four Television Corporation}}, the navbox displays as displayed above.. If the parameter |sidebar= is set to any value, then the template displays as a sidebar across the length of the page on its right, depending on the use of the parameters in § Additional parameters below.
A clock ident is a form of television ident in which a clock is displayed, reading the current time, and usually alongside the logo of that particular television station. . Clock idents are typically used before news bulletins and closedown, though in the past quite commonly preceded regular program