NEC GT1150 - Manual (Page 50)

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Noise Reduction (not available for RGB and PC Card Viewer)
You can select three levels video noise reduction.
NOTE: The lower the Noise Reduction level, the better the image quality by way
of higher video bandwidth.
Image Options
Keystone
This feature corrects the keystone (trapezoidal) distortion to make
the top of the screen longer or shorter to be the same as the bottom.
Use the
ᮤ or ᮣ buttons on the slide bar to correct the keystone
(trapezoidal) distortion.
Keystone distortion Normal
NOTE:
1) The maximum keystone angle that can be corrected is 30 degrees upward
and 30 degrees downward with the projector placed horizontally on the ground
plane.
2) When "Resolution" is set to "Native", this feature is not available, and the
stored settings and adjustments are invalid.
Depending on the type of graphics being used, the picture may get
blurred or keystone correction may not be possible when excessive
keystone correction is used.
The idea is, the closer you are to native resolution, the better image
you will see.
Color Temperature
This feature adjusts the color temperature using the slide bar.
Move the slide bar to the right to increase the color temperature for a
bluish image; to the left to decrease it for a reddish image.
Lamp Mode
Gamma Correction
Use the ᮤ or ᮣ button to choose "Normal" when in a lighted room and
"Natural 1&2" when in a darkened room. "Natural 1" for better flesh
tone; "Natural 2" for true reproduction of middle tones.
Each mode is recommended for :
Normal ......... For the regular picture
Natural 1 ...... For true color reproduction of natural tones
Natural 2 ...... For dark portions of a picture
Aspect Ratio (not available for RGB, DVI digital and PC Card Viewer)
You can select the aspect ratio for input signal and display area re-
spectively.
Select the appropriate aspect ratio using the Select
ᮤ , ᮣ , ▲, or ▼
button.
NOTE: When "Resolution" is set to "Native", this feature is not available, and the
stored settings and adjustments are invalid.
This feature enables you to select two brightness mode of the lamp:
Normal and Eco modes. The lamp life can be extended up to 2000
hours by using the Eco mode.
Normal Mode .............. This is the default setting.
Eco Mode .................... Select this mode to increase the lamp life.
NOTE: If you have selected the Eco mode, the lamp lights in Normal mode for 3
minutes after the projector is turned on. After 3 minutes the lamp will change to
Eco mode.