Blue-only color bars?

[Chris Poisson]

What, in PAL you don’t have to calibrate?

[Michael Gissing]

Yes we do but there is no hue control in PAL

[Rafael Amador]

I’m in PAL-land and my monitor got “blue-only” so happy about that. but I have to calibrate it with NTSC bars, because I haven’t found no where how to do it properly with the PAL bars, silly, isn’t it?

[Kurt Hennrich]

[rafalaos] “I’m in PAL-land and my monitor got “blue-only” so happy about that. but I have to calibrate it with NTSC bars, because I haven’t found no where how to do it properly with the PAL bars, silly, isn’t it?
“

calibration of saturation with PAL-colorbars is quite as easy:
press ‘blue only’ and adjust chroma value until all bright(blue) bars are equal bright.

[Rafael Amador]

Hi Kurt,
My problem is not calibrate the chroma (as you says is the same process that in NTSC with the blue-only), but the bright and the contrast. I don’t know if I have to use the PLUGE bars as has to be done in NTSC.
Thanks.
rafael

[Kurt Hennrich]

[rafalaos] ” but the bright and the contrast”

hi rafalaos
my method:
when adjusting brightness : look at black
when adjusting contrast : look at white

black of PAL-bars is 0%, white is 100%. therefor:
switch monitor to underscan and raise brightness until it differs a bit from the ‘no image’ area. now lower brighness a bit so that compared to ‘no image’ black is barely visible.
reduce contrast until bar-white dimmes. now raise contrast a bit so that white is pure white again.
once again for brightness, once again for contrast.

looking at the colorbars adjust saturation by pushing ‘blue only’ at the monitor and adjust sat until the blue bars are equal bright.

…. this all only makes real sense with a good monitor (without ‘auto gain’ behaviour)

kurt

[Rafael Amador]

Thanks Kurt. I’ll try like that.
Cheers,
rafael