Thread: Black line at the top of screen? What is it??
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  #9  
Old 05-15-2012, 09:01 AM
Chip Chester Chip Chester is offline
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Join Date: Apr 2012
Posts: 761
It's the analog closed-captioning data, on line 21 of the vertical interval. Normally blanked, of course... Line 21 is sposed' to be the last unseen line before active picture.

Chip
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