To Trigger On A Specific Line Of Video - Agilent Technologies InfiniiVision 2000 X-Series User Manual

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To trigger on a specific line of video

Video triggering requires greater than 1/2 division of sync amplitude with
any analog channel as the trigger source. Turning the trigger Level knob in
Video trigger does not change the trigger level because the trigger level is
automatically set to the sync pulse tips.
One example of triggering on a specific line of video is looking at the
vertical interval test signals (VITS), which are typically in line 18. Another
example is closed captioning, which is typically in line 21.
1 Press the [Trigger] key.
2 In the Trigger Menu, press the Trigger softkey; then, turn the Entry knob
3 Press the Settings softkey, then press the Standard softkey to select the
4 Press the Mode softkey and select the TV field of the line you want to
5 Press the Line # softkey and select the number of the line you want to
Alternate Triggering
N O T E
If Line:Alternate is selected, the oscilloscope will alternately trigger on the selected line
number in Field 1 and Field 2. This is a quick way to compare the Field 1 VITS and Field 2
VITS or to check for the correct insertion of the half line at the end of Field 1.
Agilent InfiniiVision 2000 X-Series Oscilloscopes User's Guide
"To trigger on all sync pulses"
"To trigger on a specific field of the video signal"
"To trigger on all fields of the video signal"
"To trigger on odd or even fields"
to select Video.
appropriate TV standard (NTSC).
trigger on. You can choose Line:Field1, Line:Field2, or Line:Alternate.
examine.
on page 128
on page 130
on page 131
Triggers
on page 129
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