Tektronix TDS3SDI, Technical Reference

Page: 50 / 54

Reference
40
TDS3SDI 601 Digital Video Technical Reference
Example 7: Holdoff Fields
In this example, you are examining a 525/NTSC composite video
waveform from a 601 digital video signal. You need to examine the
colorburst signal of field 1 without mixing it with the out-of-phase
colorburst signal of field 3. Do these steps:
1. Push the QUICKMENU button to display the QuickMenu.
2. If the video QuickMenu is not displayed, push the MENU bottom
button to select Video.
3. Push the SUBMENU bottom button to select ITU-R 601.
4. Push the INPUT side button to select 525.
5. Push the AUTOSET Video bottom button to select Lines.
6. Set the horizontal scale to 1.00
µ
s.
7. Use the HORIZONTAL POSITION knob to position the
colorburst signal toward the center of the screen.
8. Push the Field/Line side button to select O Line n, where n
represents the current value of the line argument.
9. Rotate the general purpose knob to set the line number to the first
colorburst line, which for NTSC signals is line ten.
10. Push the Holdoff side button to select Fields. This menu lets you
specify the number of video fields to skip before re-arming the
video trigger.
11. Rotate the general purpose knob to set the number of holdoff
fields to 2.5.