Bell & Howell test patterns: Difference between revisions
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* White screen with red letterbox bars, 1000 Hz tone (120 seconds) |
* White screen with red letterbox bars, 1000 Hz tone (120 seconds) |
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* White screen, 1000 Hz tone (medium clicking, 60 seconds) |
* White screen, 1000 Hz tone (medium clicking, 60 seconds) |
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* White screen, 1020 Hz tone (15 seconds) |
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* White screen, 1033 Hz tone (60 seconds) |
* White screen, 1033 Hz tone (60 seconds) |
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* White screen, 1133 Hz tone (30 seconds) |
* White screen, 1133 Hz tone (30 seconds) |