Hi to everyone!

I'm having a hard time to calibrate my Eizo CG2420 and I'm seeking help since I bought the 5 day LT license.

Setup: Resolve (video levels) --Thunderbolt3--> Ultra Studio Monitor 3G --SDI--> Mini Converter SDI to HDMI 6G (Restricted video levels) -- HDMI--> EIZO CG2420 (Limited Range levels)

Calibrating with Xrite i1

First of all it's not clear to me why if I put the Patch Scale / Resolution>Legal 8 bit setting found in the setting tab and in the manual measure tab I put 16 16 16 (minimum luminance for video levels) the black signal on the Eizo is lifted. The only solution I found is to put the this settings Scale / Resolution>Full 8 bit and in the manual measure tab I put 0 0 0. This seems to suggest that the patches of light illusion are a full signal containing a video one and this full signal is treated as a video one by resolve.

Regarding the calibration issue I'm calibrating following this procedure:
Since my Eizo has no internal support for 3D LUTS but only 1D LUTS I do a calibration using Color Navigator 7 setting up the EOTF and leaving the native gamut of the monitor. The Eizo is gonna store my 1D LUT.

Now I turn off the LUT from my Mini Converted SDI to HDMI 6G that I use to map the gamut of my monitor into Rec 709.
I open resolve and connect it to Light Illusion. I already unsuccessfully tried to calibrate it creating a 17 cube LUT but for this instance I'm gonna do a simpler calibration with Grad Ramp RGBCMY Large +. This is when I encountered the first problems, the light illusion doesn't give me the same gamut results every time, I have two screenshots of two calibrations runs that did back to back and I got drastically different results, especially on the blue spectrum. I think Run1 had a bad reading so all the other graphs are from Run2. I'm gonna attach all the other settings I used to calibrate the monitor below.

From the calibration results you can see that the gamma did align properly but the gamut is not being compressed as much as it should be.
What am I doing wrong?
Obviously all of this problems are accentuated when I do a cube based calibration.

Hope there is somebody that can helping me regarding this issue.

Best,
P.

Levels Problem	Color Navigator Settings	Calibration Run1
Calibration Run2	Calibration settings	LUT Creation
Cal check1	Cal check2

With ColourSpace sending 16 as black, and the monitor showing that as grey, that shows you have a Legal vs. Full configuration error somewhere.
Likely in the input mapping within Resolve, but could be anywhere in the signal path.

The variation on the profile measurements is likely an issue with the Extra Delay not being set correctly.

And the LUT not compressing the gamut correctly also points to an issue with Legal vs. Full Range.
Possibly also needing Video Scale to be applied to the LUT.

All these issues are also defined in the User Guides, such as within Calibration Issues.

Steve

Resolve is set to video/legal, so therefore you need to set CSpace to FUll range as Resolve is doing the scaling to match the monitor expected signal range. As you are sending legal range video signals through the lut box, you need to scale the lut before loading it into the BMD lut box using the Pass Black or Clip Black under the Adjust LUT tab in the LUT tools.

Stuart

Thank you guys for the replies, you really helped me figure out some errors in my workflow.

||I'm gonna update you so everyone in my situation can find a solution too.||

Incorrect patches reading --> Fixed by adding extra delay (0.04)
Resolve levels --> Needs to be set to Full and you control Full of Limited via ColourSpace Patch Scale/Resolution, also works in 8bit only
Incorrect Gamut scaling in Limited Range --> Calibration 3D LUT needs to be scaled for Limited range by applying Clip Black filter in Adjustment LUT menu

To solve all of this issues I started by trying to calibrate full range on my monitor since it seemed to be the most straight forward way to calibrate with Resolve.
Light Illusion (Full levels in Settings) --> Resolve (Full levels in timeline) --> BM SDI to HDMI 6G (Unclipped clip levels in settings) --> EIZO CG2420 (Full Range)

I stared by doing Grey Ramp RGBCMY+ to make ensure everything was mapping out correctly, then I proceeded to do a cube 17 calibration. I attached the screenshots of the results below.

Then I tried to calibrate my monitor for Limited range changing this settings:
Light Illusion (Limited levels in Settings) --> Resolve (Full levels in timeline) --> BM SDI to HDMI 6G (Unclipped clip levels in settings) --> EIZO CG2420 (Limited Range)

In LUT creation I applied the Video Scale>Clip Black filter. I attached the screenshots of the results below.

For sure I got way better results since my first post but I still have a couple of questions for you guys and I hope you can help me again.

LUT filter Clip black is designed to clip the darkest part of the image (I imagine 0-16 range) to make the out suitable for Video Levels calibrations. It's not clear to me why it doesn't t clip the top part of the range as well. Is it keeping informations in the range 16-255 or I m not considering something here?

Also is there somewhere were I can find more informations about Video Scale filters effect my calibration? Ex. Clip Black vs Clip Black SW or why I should use Clip Black or Pass Black

Last thing is that the lower luminance part of my calibration is kinda messi with dE, in my experience that doesn't make as big of difference in grading than the mid range. Should I try to make that part better too and how could I achieve it?

Thanks for anyone that takes their precious time to take part in this conversation!

Best,
P.

Full range cal 1	Full range cal 2	Full range cal 3
Limited range cal 1	Limited range cal 2	Limited range cal 3
Limited Range LUT

Wanted to add a note
If you want to calibrate full levels via the sdi port you have to set the monitoring of the Resolve timeline to RBG 4:4:4 since Y Cb Cr works in the range 16-235

Please see the Interactive User Manual for info on the different options within ColourSpace, including Video Scale.

Steve