Quick Menu - VarTech Systems VT170CM User Manual

Vt170 series military / marine series 17.0” flat panel lcd displays
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3.8

Quick Menu

The Utility submenu contains the following functions:
Navigation Buttons
UP
DOWN
LEFT
RIGHT
Menu Item
Explanation
On a CRT monitor, the brightness control is really a black
Brightness
level adjustment and is set so that the background raster is
just cut off when a black screen is displayed. On an LCD
monitor, the brightness control is a control of the backlight
luminance level. Both black and white levels change with
changes in backlight luminance. When setting this control,
the analog luminance control should be set full clockwise
(maximum). The setting of this control then becomes a limit
on the range of the analog luminance control.
Contrast
The contrast adjustment is an adjustment of the gain of the
monitor's video amplifiers, or, in other words, of the range in
luminance between black and white. When analog video is
presented to the monitor, a black to white transition is
represented, ideally, by a voltage transition of 0.7V.
PIP Mode
PIP means "picture in picture". PIP mode is available only
when both an RGB video source (digital or analog) and an
NTSC/PAL video source (S-video or composite video) are
connected to the monitor. The current version of the product
does not support this function.
Scaling Mode When the format of the video presented by the external
source does not correspond to the monitor's native format the
image is displayed in one of three ways: 1) it is scaled to fit
the screen, 2) it is scaled up, but the aspect ratio is
preserved,
pixel for pixel.
Fill All: Scaling an image so that it fills the screen provides
the largest usable image. However, when the aspect ratio of
the image does not correspond to the aspect ratio of the
screen its original aspect is lost. Thus, if it contains circles,
they can look like ellipses after scaling.
Fill Aspect: Scaling an image up while preserving aspect
ratio ensures that the original image is presented without
major distortions. However, in this case, the image might not
fill the screen entirely. It will fill the screen horizontally, but
not vertically.
1:1: For very exacting applications, usually applications
involving the display of very fine text or symbols, in which no
scaling artifacts can be tolerated, it might be desirable not to
scale the image but to map it pixel for pixel to the display. In
this case, the image might fill only a small area of the display,
leaving black at right and left as well as at top and bottom.
But note that the scaling engine in this monitor can be ad-
justed to minimize artifacts using the SHARPNESS control on
the Picture menu.
Use the UP or DOWN button to select the desired function.
Use the LEFT or RIGHT button to set the value of the selected
function. Use the SOURCE button once a setting has been made, and again
to return to the Main Menu.
16
3) it is not scaled, but mapped to the screen

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