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PulseBar (TV formats only)
Description: The image looks like two vertical lines followed by
a wide vertical bar on a display’s screen. The first
line is a sine-squared modulated pulse that fades
from black to red and back to black. The pulse is
20T for PAL and 12.5 T for NTSC formats. The second
narrower line is a 2T white sine-squared pulse. T =
100 nSec for PAL and 125 nSec for NTSC formats.
The wide bar is white with sine-squared edges.
Test: Video System Testing
This multi-purpose pattern can be used with other
instruments to check television K factors. The
modulated pulse can be used to check chrominance-
to-luminance delay and gain. The narrow white line
can be used to measure short term linear distortion
(K2T). One scan line of the image, as it would appear
on a waveform analyzer, is shown here: