Cineversum Force one, User Manual

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8.0 ADJUSTING THE IMAGE
54 R599790 - FORCE Series User Manual
Good RGB or input levels—that is, the drives and black levels for each of the three colors, red, green and blue—
ensure that images from analog sources other than decoded video have maximum contrast without crushing black
or white. By default (and in an “Auto Setup”), the projector automatically determines the best input levels by
monitoring image content and adjusting the controls appropriately—further adjustment is typically not required to
obtain proper blacks or whites.
NOTE: This automatic adjustment requires at least 6-12 consecutive white pixels in the image. Without these pixels,
input levels may produce skewed colors, particularly in non-video images.
For a source exhibiting overly high black levels (typically caused by a noisy source causing black level spikes) use
the Input Levels menu (shown above). These adjustments, serve as a calibration process compensating for
differences in sources and cabling, to perfect the source image input levels and eliminate the “overshoot” and
“undershoot”.
NOTES:
1) Input Levels are of limited use with digital signals, but do offer some ability to tweak poorly mastered source
materials.
2) Input levels apply for the current source only, but for any color temperature used.
3) 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.
• Auto Input level
Use 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. This compensates for incoming out-of-range drives (white) and black
levels (black) that would cause “crushing” of light and dark colors in the image. After entering a checkmark, wait for
the six slide bar values to stabilize, then delete the checkmark and exit. The Auto Input Level is automatically turned
off upon exit from the Input Levels Menu.
• Black Levels and Input Drives
To check your image levels and adjust these controls:
1) Ensure overall “Contrast” and “Brightness” settings are both set to near 50. NOTE: Not required for “Auto”
adjustment.
CONTRAST = 50 (approx.)
BRIGHT = 50 (approx.)
2) Check the color temperature setup using an internal grayscale test pattern, making sure to obtain a neutral
grayscale. NOTE: Not required for “Auto” adjustment.
3) Confirm that you are using input on an Analog BNC card or a Dual Link DVI card. Input Levels are not
applicable for sources going through the decoder. A grayscale is recommended.
4) 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. Enable “Auto” in the Input Levels menu. Wait for all six values to stabilize.
Alternatively, do not use “Auto”—reduce black levels 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 Auto Color Enable option (described below).
5) 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.
• Auto Color Enable
When a checkmark is present, selecting a specific black level or drive to adjust will automatically enable the
corresponding color in the display. Delete the checkmark to see all colors, or to enable a different specific color
through the Color Enable control.
• Clamp Location
Brightens the image produced from certain high-resolution high-frequency graphic sources. The projector
automatically selects the best clamp location for most sources. 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 back
porch location (which is likely too short) to the tip of the horizontal sync pulse. Tri Level is typically needed for an
HDTV source.
• Input Peak Detector
A tool to assist with defining individual input levels, enabling you to accurately set the Input Levels for any particular
source with the appropriate image. 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 black levels and input drives until both black
and white edges are just visible and distinguished from neighboring pixels. Images from this source will then display