Christie DLV1280 DX User Manual page 67

OPERATION
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DLV1280 DX User's Manual
Levels are of limited use with digital signals, but offer some ability to tweak poorly
mastered source materials.
AUTO INPUT LEVEL –
Keep off for virtually all sources (default). Temporarily enter a
checkmark only if you are an experienced user and you have an unusual source that
you feel needs further color temperature and/or input level adjustment. After entering
a checkmark, wait for the six values to stabilize, then delete the checkmark and exit.
BLACKLEVELS AND DRIVES -
1. Make sure overall Contrast and Brightness are both set to near 50.
NOTE: Not required for "Auto" adjustment.
•
Cont
•
2. Check the color temperature setup using an internal grayscale test
pattern, adjusting as desired to obtain a neutral grayscale. NOTE: Not
required for "Auto" adjustment.
3. Make sure you are using an analog source not connected to
INPUT 4
, as Input Levels are not applicable for digital sources or sources
going through the decoder. A grayscale is recommended.
4. If the blacks and/or whites appear OK, input levels do not need
adjustment. If black levels are too high (and/or whites are too low, which
is rare), you likely have a noisy source that is producing skewed input
levels. Continue with Step 5.
5. Temporarily enable "Auto" in the Input Levels submenu. Wait for all 6
values to stabilize. Alternatively, do not use "Auto"—reduce blacklevels
manually instead. Judge by eye and change one or more of the six levels
as necessary to obtain proper blacks and whites. You may want to see
only a certain color while adjusting—use the "Color Enable" option
(described below).
6. Delete the "Auto" checkmark and leave the Input Levels menu.
IMPORTANT: Do not use Input Levels to adjust color temperature. This will
distort Contrast and Brightness functions as well as color temperature.
CLAMP TIP –
This option (full name sync tip clamping) can brighten the image
produced from certain high resolution, high frequency graphic sources. Enter a
checkmark if the image appears unusually dim, if there are horizontal streaks across the
image, or if there is significant color drift. Delete the checkmark if the image is either
sufficiently bright or overly bright.
NOTE: The sync tip clamping option is not used for video sources or any RGB source
with sync information on the video (e.g., sync-on-green).
COLOR ENABLE –
Select which color or colors you want to see, useful while working
with color temperature white levels or input levels.
NOTES: 1) Input levels apply for the current source only, but for any color
temperature used. 2) Assuming that color temperature has been set up based on the
internal test patterns, you can then set up input levels for a given source so that it
matches the color temperature of the internal test patterns.
To check your image and adjust these controls:
= 50 (approx.)
= 50 (approx.)
INPUT 3
or