71Pinnacle Systems TARGA 3000
• Hue -- The property or wavelength of a color. Hue is the attribute of a color perception
for base colors such as red, yellow, green, and blue. Hue is completely separate from the
intensity or saturation of a color. A hue has only one wavelength associated with it while
a blend of hues, such as white, has multiple wavelengths. Therefore, white and black are
colors but not hues. The Hue control adjusts the subcarrier phase so that the displayed
“color” agrees with your conception. An example is the flesh tone of a person. This can
be adjusted over a “gamut” of red to green, but the “colors” within that gamut would have
the same hue. This control slider only affects the composite and S-Video outputs.
• Sharpness -- This controls the contrast at a boundary within an image. As such, it is an
attribute of the luminance bandwidth. Increasing “sharpness” increases the luminance
bandwidth. This control slider affects all video output formats.
• B-Y Gain -- Adjustments made here increase or decrease the peak-to-peak amplitude of
the B-Y (blue minus luminance) color channel. Note that an adjustment here
simultaneously affects the color level on composite, S-Video, and YUV.
• R-Y Gain -- Adjustments made here increase or decrease the peak-to-peak amplitude of
the R-Y (red minus luminance) color channel. Note that an adjustment here
simultaneously affects the color level on composite, S-Video, and YUV.
• ScH Phase -- Used to align color information in your video signals, and will require a
vector scope. Color information is carried in the part of the signal called burst. The burst
is composed of a carrier frequency of 3.58 MHz for NTSC and 4.43 MHz for PAL. For
NTSC, the ScH phase refers to the phase relationship between the leading edge of
horizontal sync at the 50% amplitude point, and the zero crossings of the color burst by
extrapolating the color burst back to the leading edge of sync. This is expressed in
degrees of subcarrier phase. The definition for PAL is slightly different, but similar.
This control slider only affects the composite and S-Video outputs.
— Again, once video is seen on your output monitor, experiment with the slider controls
to see the effects on the picture quality. When you're done experimenting with the
sliders, click on the “Reset” button to move all of the sliders back to their factor
default values.
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