Color correcting - broadcast warning.

what does the yellow exclamation mark on broadcast safe mean.
Have been reading Ken stons CC tutorials and have been working to make my whites hit the 100 mark in my waveform.
If it goes over 100 the warning lines turn red - obviously illegal - but am getting this warning even if my whites ar under 100 - i.e white but broadcast legal.
The only time i get a green tick is when my whites are way away from 100 (at 90) and horribly almost grey.
The image I am using is pretty much black and white and even when I use autoblack/white the white is defaulting to this 90% grey.
Surely this is not right.

In ken stones tute he says that on FCP scopes the
black and whites are absolute 0 and 100 - unlike
external scopes in which the blacs would be 7.5 etc
This in reference to digital vs. analog NTSC scopes and the signal being measured. Digital video is zero black while analog video usually has setup added which is 7.5 IRE black, in NTSC land. You don't have to worry about this.
so I am trying to get my whites to that 100.
I turned range check off - and yeah the chroma was
fine - the luma was over.
What is the ebst way to stop this excess Luma without
dropping the whites to grey.
By the way - the image I am using is very similar to
this web page - pretty much blanket white wih a small
patches of purple and black - so it is easy to tell
when the whites arent right.
the warning for excess luma is also across the entire
screen, not just an area which suggest that
absolutely all the whites on screen are above legal.
You can use any of the image control filters but the 3way is usually the best tool for darn near anything. If your white is measuring over 100%, you need to lower your white point. You didn't mention what sort of video this is as DV has the capability to capture Superwhite which is a luma level of 109% (that's kinda weird, how can anything be over 100%?). Then for good measure apply the broadcast safe filter over all of it which will clip any errant specular highlights.
Zeb

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