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Bell & Howell test patterns: Difference between revisions

Bell & Howell test patterns (edit)

Revision as of 06:16, 7 March 2022

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Line 31:
* White screen with red letterbox bars, 1000 Hz tone (120 seconds)
* White screen, 1000 Hz tone (medium clicking, 60 seconds)
* White screen, 1020 Hz tone (15 seconds)
* White screen, 1033 Hz tone (60 seconds)
* White screen, 1133 Hz tone (30 seconds)
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