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64 Runco X-200i Series Installation/Operation Manual
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Gamma: Select Gamma from the Advanced Image menu to choose a DLP de-gamma
curve. The available settings are 1.8, 2.0, 2.2, 2.35 and 2.5. The value chosen here
corresponds to the power variable in this equation:
Output = Input
Power
The X-200i applies this gamma curve to all three primary color channels (red, green and
blue). Used correctly, the
Gamma control can improve contrast while maintaining good
details for blacks and whites.
If excess ambient light washes out the image and it becomes difficult or impossible to see
details in dark areas, lower the gamma setting to compensate. This improves contrast
while maintaining good details for blacks. Conversely, if the image is washed out and
unnatural, with excessive detail in black areas, increase the setting.
Color Temperature: Color temperature defines the “color of gray;” that is, adjusts the
75% white point to various color points.
To choose a color temperature setting, select Color Temperature from the Advanced
Image menu. Then, press or to select 5500K, 6500K, 7500K or 9300K. The default
setting, 6500K, is appropriate for most situations. Higher settings produce a “bluer”
picture; lower ones impart a reddish hue to the image. Select Native to disable white
point adjustment of the source signal.
DLP Frame Rate (2D content only): Select DLP Frame Rate from the Advanced Image
menu to choose the output frame rate for 2D content. You can have the X-200i
automatically determine the optimum frame rate, or you can force it to use a specific
frame rate. (This control is disabled when viewing 3D content.)
• The default setting, Auto, frame locks to the main source if it has a vertical refresh rate
of between 48 and 62Hz. Vertical refresh rates of from 24 to 31Hz are doubled. Frame
rates between 31 and 48Hz and greater than 62Hz are converted to 60Hz.
•Select 48Hz to force the output frame rate to 48Hz. Use this setting to eliminate 2:3
pull-down judder with 60Hz film-based sources.
• 50Hz and 60Hz force the output frame rate to 50Hz and 60Hz respectively.
Color Gamut: Select Color Gamut from the Advanced Image menu to select a color
gamut (range) that may be different from the default color gamut.
Each setting defines the precise hue of each primary (red, green and blue) and secondary
(yellow, cyan and magenta) color component used to generate the millions of colors
produced in displays. Changing either or both of these numbers changes the hue of the
color and relocates the “triangle” for possible colors. For example, changing the x/y
coordinates for red moves the color closer to either orange or violet, which in turn affects
all displayed colors having a red component.
• Auto automatically chooses the appropriate color gamut:
• SMPTE C for NTSC, 480i and 480p sources.
• EBU for PAL, SECAM, 576i and 576p sources.
• REC709 for all other sources.
The Color Temperature setting is unavailable when you choose the
“PCE” Color Gamut setting (refer to Color Gamut, below).
Note