NEC LT158 - Manual (Page 38)

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Position/ Clock (when Auto Adjust is off)
This allows you to manually adjust the image horizontally and verti-
cally, and adjust Clock and Phase.
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: The maximum keystone angle that can be corrected is 40 degrees up-
ward and 20 degrees downward with the projector placed horizontally on the
ground plane.
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.
Lamp Mode
Aspect Ratio allows you to select the best Aspect mode to display your
source image.
When 4:3 is selected from the source (i.e. DVD player), the following
selections will display:
Standard
4:3 Aspect All 4 sides
stretched Left and right
stretched Left and right
stretched
16:9 image
displayed
in 4:3 mode All 4 sides
stretched
Normal Zoom Wide Zoom Cinema
Normal Zoom Wide Zoom Cinema
Left and right
stretched Left and right
stretched to
display the true
aspect
When 16:9 is selected from the source (i.e. DVD player), the following
selections will display:
This feature enables you to select two brightness modes 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
one minute after the projector is turned on. After one minute the lamp will
change to Eco mode.
Aspect Ratio
Noise Reduction
You can select three levels of video noise reduction.
NOTE: The lower the Noise Reduction level, the better the image quality by way
of higher video bandwidth.