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Some broadcasters that have ceased signing on and signing off in favour of 24-hour broadcasting may perform a sign-on sequence at a certain time in the morning (usually between 4:00 and 7:00 a.m.) as a formality to signify the start of its operating day (in the United States, the broadcast logging day begins at 6:00 a.m. local time).
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.
For example non-free use rationales, see Wikipedia:Use rationale examples. This template is only for use on images which are screenshots from television. For screenshots of title cards of television programs or station IDs, use {{Non-free title-card}} instead. Template:Non-free use rationale may be helpful for stating the rationale.
The central image on the card shows Carole Hersee playing noughts and crosses with a clown doll, Bubbles the Clown, surrounded by various greyscales and colour test signals used to assess the quality of the transmitted picture. It was first broadcast on 2 July 1967 (the day after the first colour pictures appeared to the public on television ...
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On BBC One, the sequence was as follows.It began with a rundown of the following evening's schedule, the national weather forecast, a public information film (Monday to Thursday nights only), a closing announcement wishing goodnight to viewers and pointing them towards BBC radio services on air through the night, made over the clock and finally a rendition of the National Anthem (God Save the ...