color-bar test pattern

color-bar test pattern

[′kəl·ər ‚bär ′test ‚pad·ərn]
(communications)
A test pattern of different colors of vertical bars, used to check the performance of a color television receiver.
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A color-bar test pattern on the screen casts a gently moving rainbow on the wall as an elderly Englishwoman holds forth on various methods of high-speed typing, perfume, and, predominantly, the BBC Radio 4 programming--plays, the news, the shipping forecast, Women's Hour--that is her daily companion.