Quantum Data 881 User Manual page 291

882 Video Test Instrument User Guide (Rev A.35)
The following table describes the parameters of the Ramp12 image through Image Control
Tool.
Function/Field Function
Starting Level This slide bar sets the beginning (left most) grayscale level in the
ramp. This is expressed as a percentage of the total range defined by
the setting of Number of Bits per Component (NBPC) from 0% to
100%. For example, if NBPC is 12 the total range is 4096 with a full
gamut setting. Note that the 882E can only display up to 1024 colors or
shades of gray simultaneously on one image (if PELD = 32).
PELD This is the pixel depth within the 882. It defines the number of colors
available to the 882 for rendering simultaneously on an image. The
valid values for the PELD pulldown select box are 8 and 32. A setting
of 8 means there is a maximum of 256 on-screen luminance levels. A
setting of 32 means there is a maximum of 1024 on screen luminance
levels.
Gamut (Range) Sets the number gamut (range) of the output levels. This corresponds
to the DVQM parameter. The values are Max (DVQM=0),
MaxTV(DVQM=1) and NomTV (DVQM=2) this is the default for TV
formats.
Clr (Color) Space This pulldown select box specifies the color space. This field
corresponds to the DVST and DVSM commands. Valid values are:
RGB (DVSM=0), YCbCr4:2:2 (DVSM=2), YCbCr4:4:4 (DVSM=4).
NBPC This pulldown select box specifies the color depth per component. By
setting this value to 12, the 882 will put out 12 bit/component deep
color video. When you change this field the setting is applied to the
882. Valid values are 8, 10 and 12.
GET The GET activation button updates all the fields on the image control
in the event changes are made directly on the front panel or through
the command line. Associated with the GET activation button is a
string of information that tells you what format is currently active.
Note: The 882 LCD will not show the updated values changed using the Image Control
Tool in real time. You have to press the + key on the 882 to update the LCD.
For example, given the following settings:
• Format = 1080i30 (HRES = 1920)
• NBPC = 12 for 12-bit/component color
• PELD = 32 (maximum 882 color)
• Clr Space (DVST) = RGB
• Gamut (DVQM) = NomTV (256 to 3760 [with RGB and NBPC =12])
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