NewTek TalkShow VS-100 - Manual (Page 55)

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A switch at the top of the Proc Amp control group toggles the feature on/off. Other
controls operate as follows:

Brightness: Adjustment range from -50 to +50 IRE (the default being 0). As
reference, the full luminance range of the visible portion of a video signal can be
thought of as ‘100 IRE units’ (named for the Institute of Radio Engineers) – ignoring
minor regional variations.

Contrast – Adjustment range from 25 - 400% (default 100%).

Hue – Adjustment range between -180° and +180°. Adjusts the master color of the
video signal from the attached source, swinging the entire image through the color
wheel’s spectrum.

Saturation – Adjustment range from 0-500%. Zero saturation results in a ‘black and
white’ picture; increased saturation results in richer colors. High saturation values
can exaggerate the color portion of the signal.
(Note that over-saturated colors are considered illegal for broadcast transmission,
and may result in display problems on some devices.)
FIGURE 47

White Balance – This secondary control group adds U Offset and V Offset controls to
the Proc Amp.
o The U portion of the video signal carries blue and yellow color information.
Rotating the U Offset knob clockwise shifts the signal toward blue, while a
counter-clockwise twist shifts the signal toward yellow.