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:

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Quantum Data 801GC, 801GF, 801GX manual PulseBar