HD3G7 HD 3 Gb/s SDI Video Generator module
The following t
able lists the signal set assigned to each test signal button and the
signals that can be selected in the signal set when the module is in generator mode.
Table 3-37: HD
3G7 module signal sets assigned to the test signal buttons
Button name Signals in the signal set Description
COLOR BAR 100% Color Bars,
75% Color Bars (100% White),
75% Color Ba
rs (75% White)
Eight full-height bars of white, yellow, cyan, green, magenta, red,
blue, and black. This pattern is available with three variations, at
100% value f
or all bars, at 75% value for colors and 100% for
white, and at 75% value for all bars.
SMPTE EG1 Color Bars Color bars per SMPTE EG 1-1990. This pattern includes 75%
color bars, reverse blue bars, −I and +Q sections, black, white,
and pluge s
ections. Note that this pattern is only available for
YCbCr formats, since the −I and +Q sections contain c olor
components outside of the legal RGB gamut.
SMPTE RP219 Color Bars Color bars per SMPTE RP 219-2002. This pattern is intended for
16×9 aspe
ct ratio displays, with additional elements as compared
to EG1 bars. The HD3G7 implementation includes −I and +Q
sections, but unlike the similar sections in EG1 bars, they have
additio
nal luminance to stay within RGB gamut. The −2% patch of
the pluge section is clipped to 0% black for XYZ formats.
SMPTE EG432-1 Color Accuracy Split-screen color bars using values from SMPTE RP 431-2-2007.
The upper half of the pattern is essentially the same as 100%
color b
ars, corresponding to the “–1” set of colors definedinTable
A.4 of the RP. The lower half is a set of desaturated color bars,
corresponding to the “–2” color patch values.
LINEARITY
5StepStaircase,
10 Ste
pStaircase
Series of vertical bars of equal steps on all three channels. These
patte
rns are color-independent so they will appear differently in
YCbCr, RGB, or XYZ color spaces. Since the range of valid levels
is not evenly divisible by 5 or 10 steps, the first and last bars
slig
htly exceed the valid range, but are still well within legal limits.
For example, the valid range for 10-bit YCbCr formats is from
64–940 for the Y channel (876 steps) and from 64–960 for the
Cb/C
r channels (896 steps). Therefore, the level of the first bar is
62 and the level of the last bar is 942/962, which results in equal
step sizes across the pattern.
Valid Ramp,
Y Valid Ra mp,
B-Y
Valid Ramp,
R-Y Valid Ramp
The Valid Ramp is a matrix of three different ramps, designed
to
test the video component channels for YCbCr, and for gamut
range testing in all color spaces. These three ramps are also
available as individual patterns that span the picture width. First,
th
e Y Valid Ramp spans from black to white, across the valid
range of the luminance (Y) channel. Next, the B−Y Valid Ramp
spans from yellow to cyan, across the valid range of the Cb color
d
ifference channel. Last, the R−Y Valid Ramp spans from cyan to
red, across the valid range of the Cr color difference channel.
3 Channel Ramp Wide ramp from the lower valid value to the upper valid value for
all three channels. This pattern is color-independent, so it will
appear differently in YCbCr, RGB, or XYZ color spaces. On each
side of the ramp there are small plateaus at the blanking level
(black) and at the valid level.
3–166 TG8000 Multiformat Test Signal Generator User Manual
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