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Along vertical lines the color temperature is constant but is
different from black body curve, which mean if you select
point from the high part of the diagram you increase the green
componet, while low part of diagram cause an increase of
purple component.
GAMMA CORRECTION
Determines the system’s response to the grey scale, empha-
sising or attenuating the different grades of brightness (blacks,
dark, medium, light grey, whites) in the projected image.
There are availabel up to 12 degamma curves, using these
curves it is possible choose the best curve for the signal and
the image in use.
OVERSCAN
Remove noise around image. Some sources can produce a
picture with noise along edges, thanks to the overscan function
it is possible to drop such imperfections outside the projected
area. The overscan value can be included between 0 (no
overscan) and 32 (maximum value). The image maintains in
any case the aspect.
POSITION
Use this adjustment to position the image vertically and horizon-
tally. Determines the aspect ratio of the projected image.
These parameters do not normally require adjustment becau-
se the system checks the input signal and automatically sets
the
most suitable values.
However, if the image is not perfectly centralised it may prove
useful to request the system to repeat the input signal analysis
and image positioning, calling the automatic control procedure
from the AUTO button on the remote control or keypad. When
this procedure is called it is helpful to have a white or light co-
loured background on the screen in the current picture.
FREQUENCY/PHASE
These adjustments, available for progressive signals and for
signals from PC, ensure correspondence between the number
of pixels making up the signal and the number of pixels making
up the projected image.
These parameters do not normally require adjustment because
the system checks the input signal and automatically sets the
most suitable values.
However, if the image appears disturbed (loss of position within
the equidistant vertical bands or instability and lack of sharpness
on the narrow vertical lines) it may help to prompt the system to
repeat the input signal analysis and determination of the best
parameters by calling the automatic adjustment procedure
with the
AUTO
key on the remote control or on the keypad.
If the automatic procedure fails to have the required effect,
enter the frequency and phase values manually and ap-
proach the screen sufficiently to observe the effects of the
adjustments.
Y / C DELAY
In the case of Video and S-Video signals, it may be necessary
to correct horizontal colour misalignment within the projected
image. For a given video standard (e.g. PAL or NTSC) the stored
value does not normally require further fine-tuning, unless the
source or connection cable has changed.
TABLE 2 - INPUT SIGNALS AND ADJUSTABLE/SETTING ITEMS
POSITION
ASPECT
Video
S-Video
RGBS YCrCb Graphic RGB
HDMI™
RGBS 15kHz
YCrCb 15kHz
ADJUSTEMENTS
INPUTS
FREQUENCY - -
- - -
PHASE
COLOR TEMPERATURE
GAMMA CORRECTION
OVERSCAN
Y/C DELAY
-
-
-
-
-
-
-
Adjustable/can be set Not adjustable/can not be set