Sony KF-60XBR800 Manual page 28

quote:
Notices that nowhere in this discussion did the grayscale come into play. That's because it
is a separate issue. All three primaries are checked using bars at 75% intensity. That
means all the test points are at the SAME content of each primary. This eliminates the
effect of grayscale imbalance. Imagine that your grayscale was set so badly that red was
50% higher than it should be. At first glance, you might think this would throw off your
checks for red push. It doesn't because the red bar and the gray bar would BOTH be
altered by the same grayscale imbalance . Both are at 75% red signal intensity and rise in
red output TOGETHER as grayscale red content is boosted. This means you can check
for color decoder accuracy even when gray scale is incorrectly balanced.
I have a suspicion that copying settings for the color decoder and
grayscale is probably not going to work very well.
(31) how come you use the warm setting? I found everything very reddish in
that setting..? Sony typically sets warm as the setting that will most closely match
6500k. I would agree that it is not correct with the factory settings. That is why I
adjusted the CUT and DRV values. The procedure in the PDF is a poor mans
approach to this. With LCDs it is very difficult to do this because the panels are
not perfectly even. When I adjusted mine for yellow you could see this very
clearly. You need a photographic gray card and a 6500k light source to judge this
with even a limited amount of precision. A photographic gray card with indirect
lighting (in the shade) from sunlight is not a bad approximation.
(32) If I tweaked video 5, should I do i t based on the progressive signal and hope
that it will work for the 480i? Wouldn't it there be subtle differences in the tweaks
of these two signals? Also, an A/B switch will not resolve the problem of signal
dependency per component input. What about the tweaks for video 6? Which
signal should I feed 1080i or 720p? will the tweak of one work over the one?
Component 7 - DVI will be another option but there are very few equipment out
there with this type of output. Most of the tweaks actually have the same value. They
therefore should apply to all inputs except for chroma delay and the user
brightness/picture settings. These settings are different for each resolution and input type
so you should not have a problem unless it is in that area. Two inputs of the same type
and resolution will not work well if one device has 0 IRE blacks and the other has 7.5
IRE blacks. You need to be careful about what the reference level of each device is that
you are feeding into each input type. The chroma delay is the most likely to cause
problems because it is defined on an input type only basis. All component inputs have the
same chroma delay regardless of resolution. This means you want all high quality devices
on a given input type that have none otherwise you will see problems that cannot be fixed
easily unless they just happen to have the same chroma delay. You will need to tweak
some of the values separately for 1080i and 720p. I personally use 1080i, but I would
choose what you like the best.
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