Definition of test card in English:

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test card

noun

British
A still television picture transmitted outside normal programme hours and designed for use in judging the quality and position of the image.
Example sentences
  • Viewers started to get used to the idea that if they switched on their TV screens before 9 am they would have a programme to watch as opposed to a test card or a blank screen.
  • Practice varied from company to company - but the ten minutes of blank silence before the ITA test card appeared always gave a dramatic feeling of finality to the transmission.
  • I still secretly believe that afternoons are the time for the test card and you shouldn't watch television when the sun is out.

For editors and proofreaders

Line breaks: test card

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