| Sync check cant distinguish anything but dark interrupted by bright flash or a ledar number (2pop us, 3pop Europe) so therefore there's no way to check sync in a pic sequence as such.
The variable sync caused by light/color changes can sometimes be seen during pans when a light part of the pic will offset visually on screen.
We have come to this conclusion by using the exact same setup with different screens. Both screens are first checked for correct alignment with sync check and the sync pop. Running the picture you can visually see the non sync parts on one screen and not the other.
When time allows I'll try some more tests as I'm not 100% certain why and when this happens.
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Europa Sound Production
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