Tektronix TG8000 User Manual page 416

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
PULSE BAR 2T Pulse and Bar
Color Pulses
TIMING Co-siting Pulse
3–266
Description
Two pulses of 2T half-amplitude width and full-scale amplitude. A
positive pulse is added to a base level at the minimum valid value,
and a negative pulse is added to a bar level at the maximum valid
value. The 2T pulse is used for Short Time response testing and
the bar is used for Line Time response testing.
The type of 2T pulse depends on the signal format:
For SD-525 format, this is a 2T4 pulse
For SD-625 format, this is a 2T5 pulse
For HD and slow-progressive 3G formats, this is a 2T30 pulse
For 3G fast progressive formats, this is a 2T60 pulse
For 4:2:2 formats, chroma pulses are at half the bandwidth
Eight color pulses of 2T half-amplitude width upon black and white
backgrounds. The upper half of the pattern has positive pulses on
a black background, testing each combination of the three color
channels. The lower half of the pattern has a white background,
so negative pulses are used to result in the same line colors. For
example, the yellow pulse in the upper half is 100% red plus 100%
green, resulting in yellow on a black background. At the same
horizontal location in the lower half, a pulse of −100% blue added
to the white background also results in a yellow line.
One single-sample wide pulse in the center of the image, used to
show the timing relationship and alignment between chroma and
luma channels. Different amplitudes are used to distinguish the
three channels.
TG8000 Multiformat Test Signal Generator User Manual