SDI7 Dual Channel SD/HD/3G SDI Video Generator module
Table 3-59: SDI7 module signal sets assigned to the test signal buttons (cont.)
Button name Signals in the signal set Description
SMPTE 303M Color Reference Color reference chart per SMPTE 303M, also known as the
GretagMacbeth ColorChecker® chart. Note that cyan patch #18
cannot be reproduced properly in the RGB and XYZ color s paces
because the red component lies at approximately −14%, which
exceeds legal limits for RGB formats. This patch will appear as
a cyan and black checkerboard pattern, where the cyan patches
are of a different hue than the full cyan patch as seen in YCbCr
formats because the red component is clipped at 0%. The color
values used from S MPTE 303M are those with respect to the D
65
illuminant.
Black-White Step Scale,
Black-Dark Gray Step Scale
Gray scale patterns per §6.9 of SMPTE EG 432-1-2007. A series
of ten different monochrome patches at increasing luminance
values is centered on a gray background, to verify gray scale
tracking. The ten steps of the black to white scale are normalized
gamma-corrected values of 1/10 to 1 and the ten steps of the
black to dark gray scale are 1/31 to 10/31.
Pluge and Luma Reference
Includes two elements to assist in black and white balance. The
left side of the pattern contains a pluge pattern, with three vertical
bars of −2%, 0%, and +2% black. The right side of the pattern
contains four gray boxes corresponding to luminance levels of
110 mV, 200 mV, 450 mV, and 700 mV (100% white) in the analog
domain. The −2% patch of the pluge section is clipped to 0%
black for XYZ formats.
Checkerboard 4×4 grid of alternating black and white patches, used to measure
intra-frame contrast per §6.8 of SMPTE SMP TE EG 432-1-2007.
Window White square centered on a black background. This pattern can
be used as an alternative to a full-field w hite pattern when it
is desirable for the average pict ure level (APL) to approximate
normal program content.
Production Aperture
Includes single-pixel wide lines at the e xtreme edges of the active
video area, marking the complete production aperture. Vertical
lines are implemented as single-sample pulses w ith no edge
filtering, so this pattern is not legal as a broadcast signal.
Clean Aperture Grid pattern per SMPTE RP 187-1995. The clean aperture
is marked by the outer markers, with overscan markers at
approximate 2.5% increments. The center 4:3 section of a 16:9
image has an additional set of aperture and overscan markers.
Each line on the grid is implemented with two horizontal lines o r a
double-width pulse centered on two samples, because the actual
aperture boundary and the center of the image each lie midway
between lines and samples.
Convergence Grid pattern of equal size squares, with a dot at the center of each
square. Each line and dot is implemented as a single horizontal
line or single-sample pulse. This pattern is used to verify
convergence of RGB channels, and no color fringing should be
visible on the white lines and dots when the channels are aligned.
TG8000 Multiformat Test Signal Generator User Manual 3–265
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