英语词汇“test card”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

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.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.

单词	test card
释义	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.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.
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