37Pinnacle Systems TARGA 3000
—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.
Signal Generator -- This is the signal generator found on the TARGA 3000 frame buffer,
and it can be set to generate pre-recorded color bars for calibration purposes. The frame
buffer signal generator can be set as follows:
—None -- No color bars are generated by the TARGA 3000 for video output.
—Color Bars (Full) -- Causes the TARGA 3000 frame buffer to generate full color bars for
video input. Choices include 100% bars, 75% bars, and full NTSC SMPTE bars.
—Color Bars (Split) -- Causes the TARGA 3000 frame buffer to generate color bars on the top
half of the video input. That is, on the video monitor connected to the Pro Analog Breakout
Box, color bars will be displayed across the top half of the monitor display. An external
signal generator can be connected to simultaneously display color bars on the bottom half of
the monitor display. The TARGA 3000 Input Controls can then be used to “match” the
TARGA 3000 generated color bars to the bars displayed by the external signal generator.
Choices include 100% bars, 75% bars, and inverted NTSC SMPTE bars.
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