CurtPalme.com Home Theater Forum

[karmat63]

I'm performing color calibration of my Marquee 9500LC Ultra. The three CRT are almost new, less the 2000 hours (green and red with colored C element), but have some uneven wear as they have been used in a simulator. I get rid of quite all the uneven wear, buinding a custom mask in photoshop and running it at high contrat. Now I can accommodate the image inside the wear with no problem.
I'm starting color calibration with projector alone, setting G2 and Drive according TIm Tech tips
http://etechvideo.com/techtip1.htm.

I ended up with a red G2 of 54 drive 24, green G2 59 drive 85, blue G2 59 drive 45.

I repeated twice the procedure being very careful, but I ended up with same results

I wonder if it is normal (especially the low G2 setting) or I have to think something is wrong in the unit (it is a late 2002 VDC unit).

Cheers.
Carmine

[Vermin]

I think I once read in some SM that the Marquee 8000 and 8500 run with a G2 level of 60. And Marquee 9000 and 9500 with a g2 of 50. Of course, only with new tubes.

[Nashou66]

This is the way I do G2. The way G2 should be set is that if you have a 0 IRE field up and raise the brightness the raster should start to show on all tubes at the same time, from there i then do a grey scale calibration and i leave the green G2's alone and only use red and blue. So first put up the 0 IRE or a 5% window so you have lighter reference and look into each tube and adjust G2 till you just see the raster light up then back off 1 or 2 clicks. I set Drives at Red 20, green 80, and blue 45 before i do G2's.

once each colors G2 is set i do grey scale first by eye like the link you posted except i leave Green alone. A probe is really the best tool. the iOne preferably as it doesn't drift over time, all filter based probes are good for only about one year maybe two.

Athanasios

[karmat63]

Of course, I use a probe for complete greyscale and gamma tracking (I own an iOne and a Lumagen HDP). My answer was only related to set a good starting point with the projector alone.
My workaround would be:
1) turn on projector only (even Moome HDMI card excluded) and set a coarse G2 and drive setting according Tim's Tech tip (but I will try your suggestions)
2) Hook up Lumagen, set correct contrat and brightness and calibrate IRE 30 and 90 (by iOne) with Marquee Tools (Drive and G2)
3) using Lumagen internal patterns, perform a complete grayscale and gamma tracking (IRE 20-100)
4) Add Moome HDMI v2 card in the mix and set low Ire gamma bump (by eyes, with the support of test pattern and known BD dark scene)
5) Repeat all misures, rewieving also contrast and brightness setting
6) Save for all Lumagen outputs (now you have a perfect calibrated Lumagen-marquee combo)
7) Add sources in the mix (BD/DVD, mediaplayer etc), project external pattern and repeat greyscale, gamma tracking, contrast and brigtness for each source, correcting what you need by Lumagen tools and saving your correction in the pertinent Lumagen output.

A question for Nashou: at which level do you set brightness and contrast, before performing G2 calibration?

Cheers, Carmine

[Nashou66]

Id do IRE 30 and 80, not 90 . Add gamma control from the lumagen last, and skip using the lumagen's greyscale for the BD source, just us that straight, for other sources where you can not use a 11 point greyscale pattern use the lumagen.

Athanasios

[draganm]

[karmat63]

[Nashou66]

[karmat63]

Back on G2 setting according Nashou's method, at which level do you set contrast and brightness, before performing G2 adjustment? Contrast 50 and Brightness 50 (as in Tim' Tech Tips)?

Thanks

[Nashou66]

[shar1950]

Will this set-up be the same for the 8500 as well ?

[karmat63]

Yes, it works for all Marquees[/b]