OK, so the engineer in me took over, and since I already had Spyder for my photography work, I got the CalMAN spreadsheet and started working over my XBR2.
Is it time for a tweaks thread, separate from discussion of stands, latest pricing, etc?
I'm still early into this, and I'm feeding test patterns from the VP50 so if that is not clean, all this is invalid. And all of this is specific to my set - reset everything to close to default to start, especially color/hue. Power saver on, Iris on medium.
First, closest to 6500K seems to be Warm 2 with gamma set to low.
Blue is the biggest offender, well high of the gamma curve at the higher IRE levels. (Not at all what I would have thought from the picture...)
Blue gain down -3 helps, got me down to ~6900K, but blue is still high, green is low. Gamma is still ~2.5.
The kicker, of course, is that real pictures (Discovery HD over DirecTV) look somewhat reddish. Could be I need to adjust, could be the meter is wrong, could be the VP50 is doing something, could be something else...
I'm certainly interested in feedback (maybe on a new thread). My condensed results so far, all with Picture 88 and brightness 58:
Warm 2, gamma off, white balance default: ~7100K, pretty flat to 20% IRE, blue very high
Warm 1, gamma off, white balance default: ~9100K, still pretty flat to 20% IRE, blue really high
Warm 2, gamma low, white balance default: ~7200K, pretty flat down to 30% IRE, blue still high
Warm 2, gamma low, white balance -3 blue gain: ~6800K, dip at 20% IRE, blue still somewhat high, red a little high, green a little low. Separation starts lower, around 30% IRE, so maybe bias, rather then gain?
My next guess is drop blue bias a notch, add green bias a notch, see where we are.
Also, I'm off to research, but does ATSC HD still have the 7.5 step up for black IRE? That could throw off the spreadsheet results if that doesn't apply to HD.