Christie Roadie HD+35K, User Manual

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3-32 Roadie HD+35K User Manual
020-100340-02 Rev. 1 (01-2010)
Section 3: Operation
NOTE: Not required for "Auto" adjustment.
3. Confirm that you are using an analog source not connected to INPUT 3 or 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
secondary menu. Wait for all 6 values to stabilize.
Alternatively, do not use "Auto", but 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 by using the "
Auto Color Enable
" option (described below).
6. Delete the "Auto" check mark and leave the
Input Levels
menu.
IMPORTANT!
Do not use Input Levels to adjust color temperature. This distorts the Contrast and Brightness
functions, as well as color temperature.
Auto Color Enable
When a check mark is present, selecting a specific blacklevel or drive to adjust automatically enables the
corresponding color in the display. Remove the check mark to see all colors, or to enable a different specific
color through the
Color Enable Control
.
Clamp Location
This option (formerly known as “sync tip clamping”) can brighten the image produced
from certain high-resolution high-frequency graphic sources. For almost all sources, the
projector automatically selects the best clamp location. Use the normal Back Porch
location if the image is either sufficiently bright or overly bright. Select
Sync Tip if the
image appears unusually dim, if there are horizontal streaks across the image, or if there is significant color
drift. This moves the clamping pulse from the normal backporch location (which is likely too short) to the tip
of the horizontal sync pulse. Tri Level is typically recommended for an HDTV source, where the back porch is
also short.
Color Enable
Select which color or colors you want to see in the display, useful while working with color temperature white
levels or input levels.
Peak Detector
The Peak Detector is a fast method for defining individual input levels, and can improve the accuracy of input
levels set by the Auto Input level function. Enabling the
Peak Detector activates a special operating mode for
detecting only pixels that are considered black or white; all other levels are displayed as a mid-level gray.
When used with a smooth grayscale pattern in which black and white are known to be at opposite edges of the
image, you can watch these isolated areas while adjusting individual blacklevels and input drives until both
black and white edges are just visible and distinguished from neighboring pixels. Images from this source then
displays correct blacks and whites without crushing or washing out. Refer to
Figure 3-18 .
1. Display a 16-level grayscale test pattern from the desired external source, and select the Peak Detector
check box.
NOTE:
The "Peak Detector" initially renders the grayscale as a uniform gray field before adjustment.
2. Display one primary color (use the
Color Enable
option to automatically select as you go).