Figure 2-11.
Full field color bars signal
2. The paragraphs describing the EIA and SMPTE color bars apply to the full field
color bars, with exception of use of the -I, W, Q, B, chroma set, and black set
signals. The full field color bars does not utilize the latter signals.
3. Certain color bar generators like the Tektronix TSG1 and TSG7 can alter the
sequence of the full field color bar pattern for various test applications.
The
following is a sample of some of the different applications:
a. Split-field Y reference signal. This signal provides color bars in the first
half of the field and luminance only gray scale in the second part of the field
(fig 2-12). The split-field Y reference signal is especially useful for checking
color balance and tracking of color picture monitors, chrominance-luminance delay,
and chrominance-luminance intermodulation.
b. Split-field red signal.
This signal includes the color bars in the first
half of the field, while the second half of the field contains the red color bar
signal only (fig 2-13).
Video system noise, VTR head-banding, and red phase are
readily seen using the solid red split field signal.
c. Split-field reverse signal.
This signal consists of standard color bars in
the first half of the field, followed by color bars in reverse order in the second
half of the field (fig 2-14).
This signal is useful in checking velocity
modulation in video tape recorders.
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