![background image](http://html1.mh-extra.com/html/snell-and-wilcox/supervisor-lx/supervisor-lx_operation-and-installation-manual_1309048028.webp)
SuperVisor LX
SECTION 4
FGAX3249400MANAA
100701
Version 1 Issue 2
4.9
Enhance
This function reveals the following menu entries.
Enhance
Horz Enh
Vert Enh
Gamma
◀
◀
◀
◀
Horz Enh
This function applies horizontal aperture correction
to the source signal and is effective in the higher
frequency bands of the signal.
Horz Enh
Preset
0
Horz Enh
The levels of correction that may be applied (in
steps of 3 units) are as follows:
-6
...... Picture is much softer than normal
-3
...... Picture is softer than normal
0
...... This is the preset setting
3
...... Picture is sharper than normal
6
..... Picture is much sharper than normal
The softer settings are useful for reducing high
frequency ringing artifacts that may be present in
some wide bandwidth source signals that may
have passed through a downconverter.
The sharper settings can be used to enhance fast
transitions in the signal.
◀
◀
◀
◀
Vert Enh
This function applies vertical aperture correction
(VAC) to the source signal and effects the vertical
resolution of the picture.
Vert Enh
Preset
0
Vert Enh
The levels of correction that may be applied (in
steps of 3 units) are as follows:
-6
...... Applies the maximum reduction of vertical
resolution.
-3
...... Applies a medium reduction of vertical
resolution
0
...... Vertical resolution is unchanged. (Preset
)
3
...... Applies a medium increase of vertical
resolution
6
.......Applies the maximum increase of vertical
resolution
The softer settings are useful for reducing the
effects of overdone vertical aperture correction that
may be present in some sources.
◀
◀
◀
◀
Gamma
In ideal circumstances, Gamma adjustment should
not be necessary. However, non-CRT devices
such as LCD panels may benefit from adjustment.
Poor ambient lighting conditions might be
compensated for with this control.
In this context Gamma is defined as the shape of
the transfer characteristic between input signal
amplitude and output signal amplitude. Normally
the shape is a straight line with a slope of unity and
the output level follows the input level over the
dynamic range of the signal. i.e. Gain does not
change with signal level.
If the shape of the transfer characteristic is
changed to a curve, gain will then change with
signal level and can be arranged to either stretch
black parts of the signal and compress white parts
or stretch white parts and compress black parts of
the signal.
Generally the output level is related to the input
level by the equation
Vout = Vin
γ
Where
γ
= Gamma Value
An example of the effects of gamma correction is
shown below.
This function is particularly useful for correcting the
non-standard Gamma characteristics of some
computer-generated images.
Gamma
Preset
Gamma 0
Gamma
The value of may be adjusted between -6 and +9
Preset is to 0.