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SuperVisor LX
SECTION 4
FGAX3249400MANAA
100701
Version 1 Issue 2
4.20
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Color Temp
This menu allows the color temperature of the PC
picture to be adjusted.
Col Temp
PC Red High
PC Green High
PC Blue High
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Red/Green/Blue High
This item allows the red, green and blue high
levels to be individually set.
Preset
R/G/B High)
0
R/G/B High
The range of control is from -128 to +127 units and
preset is to 0.
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Contrast (PC)
This item allows the overall contrast of the PC
picture to be adjusted.
Preset
Contrast
0
Contrast (PC)
The range of control is from -48 to +127 units and
preset is to 0.
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Key Color
Key Color
Key Threshold
Key Red
Key Green
Key Blue
Adjust Red
Adjust Green
Adjust Blue
The
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K
ey Threshold function sets the range or
tolerance of the key color. This needs to be
adjusted to optimize the keying.
The range of adjustment is from 0 to 50 and preset
is to 25.
The
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Key
Red, Key Green and Key Blue items
set the PC key color. The default values are Red =
96, Green = 32, Blue = 96.
The range of adjustments is from 0 to 255.
The
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Adjust Red, Adjust Green and Adjust
Blue
values need to be adjusted so that the Supervisor
LX can more accurately single out the nominated
key color.
The range of adjustment is from –128 to +127.
Given the number of PC and graphic card
combinations, it will always be necessary to
optimize keying. The following is a recommended
way of doing this:
1. Ensure that there are both Video and PC
signals connected to the Supervisor LX. The
PC needs to have a background of key color. It
is useful to have some non-key color objects in
the foreground.
2. If necessary, increase the Key Threshold value
until the video is seen replacing the key color.
3. Reduce the Key Threshold value until the video
starts to be obscured by the key color.
4. Make small adjustments to Key Adjust Red,
Key Adjust Green and Key Adjust Blue value in
turn until the video re-appears without any trace
of key color. (If you ‘lose’ the video then just
increase the Key Threshold value until it
returns).
Repeat 3 and 4 until the Key Threshold is as small
as possible - down to perhaps 2 or even 1. At this
point the video should be perfectly visible but
non-key color objects on the PC will have a keying
‘shadow ‘. Increase the Key Threshold value until
this just disappears.
Note that a Key Threshold that is too large will
produce keying in unwanted areas of the PC
image.
Display for Key Color Adjustments
Preset
Key/Threshold/RGB/Adjust
0
Key/Threshold/RGB/Adjust