Originally Posted by mark haflich
Originally Posted by Citation4444
Sometimes I can't see the blacker than black bar, and no adjustment of the projector' brightness will display it. However, with that pattern up, hit the menu button to access the Lumagen's brightness control. When clicking this control up a notch or 2, does the BTB bar become visible?
WOW. Thank you. That did it. while on contrast pattern 2, I hit menu and I think some CMS memory or something comes up with 5 choices and one is black level. Clicked it up from 0 to 2 and the black bars become visible. Did a save. I think it is just for the particular input I was on, 720p from FIOS and will have to go back and do it for 1080i sub mem. Anyhow, then called up the pattern again and went into the Sony brightness control and fine tuned it to make the bar just vanish. Problem solved. Try resolving that with an HTPC. The Lumagen test patterns are keyed to the menu where you need to go.
Mark H. Go try it. Problem solved.
I'm glad this was of use to you. I'd like to elaborate a little if you don't mind:
Your method of setting pj brightness (set CMS output brightness control up to 2 to display the -4% black level, saving and then adjusting pj brightness control to eliminate the -4% bar) is not a per input adjustment. It's a per CMS adjustment and will only be valid on those inputs using that particular CMS with brightness set to +2.
I do my pj brightness adjustment somewhat differently. I do an iterative process and adjust the pj brightness so that when I go into the CMS menu from pattern 2 (actually pattern 3 is much more precise) and go to +1 on the CMS brightness control the -4% bar disappears. I then set it back to 0 (-4% gone) and save it. This way all CMS's with their brightness set to 0 will be the same. Then, if a per input adjustment is needed, I go to the input menu and adjust the brightness for that input. Actually, in today's digital environment, I have yet to find a difference between inputs (except for my HTPC, but that's another topic).
I suggest downloading a couple of tech tips from the Lumagen site. Radiance Tip 5 describes the test patterns in great detail, and Lumagen Tech Tip 2 describes the calibration method (which has been updated for 9x9x9)
Hope this helps, and if I'm wrong on some point I hope somebody will set me straight.
BobEdited by Citation4444 - 11/20/13 at 7:11am