SMPTE Colour Bars

O

oli

Member
I own two PAL HVX200's.

One does not have SMPTE colour bars, only basic non-professional bars, while the other can generate SMPTE bars for calibrating a field monitor.

Can anyone shed some light on this unusual difference? It seems crazy as to work with the first camera, I have to export SMPTE bars onto a P2 card through FCP and then play through the camera to calibrate the monitor?!?
 
How should you calibrate a monitor with this?
There is just no way how I could calibrate, brighness, contrast, chroma and phase with this.
Why did the bars changed when I updated my firmware?
It just dosn t make sense to me.
 
Why don't you have pluge on European color bars? I don't see what NTSC versus PAL has to do with this decision.

e
 
PAL doesn't have setup. Black is 0%, not 7.5%. So you can't have "plunge" in PAL as there is no "Blacker than black"

SMTPE bars shown on a PAL monitor will either have the "0%" bar and the "7.5%" bar at the same brightness - this pushes the 7.5% bar down to 0%, which as a result throws off the rest of the levels slightly as you stretch contrast.
Or the monitor shows the 0% bar as black, and the 7.5% bar a little lighter than black - this would be due to an incorrectly fed signal, again, the levels would be off if you adjusted normally as you'd be setting 7.5% to zero.


To set up a PAL system correctly, you need PAL color bars. Or a different PAL test patern.

- Mikko
 
Thanks for the clear explanation, Mikko.
I like the idea of Black = 0.

So I guess you might think NTSC should actually be NTSB,
Not The Same Black.


Les
 
Hehe, you can't. It's self calibrating :)
There are no "phase" (AKA "Hue" or "Tint") adjustments on PAL equipment.


- Mikko
 
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