Keysight DSOX1202A - To Trigger on a Specific Line of Video

112 Keysight InfiniiVision 1200 X-Series and EDUX1052A/G Oscilloscopes User's Guide
11 Triggers
10 If you select a line # mode, press the Line # softkey, then rotate the Entry knob
to select the line number on which you want to trigger.
The following table lists the line (or count) numbers per field for each video
standard.
Video Triggering
Examples
The following are exercises to familiarize you with video triggering. These exercises
use the NTSC video standard.
• "To trigger on a specific line of video" on page 112
• "To trigger on all sync pulses" on page 113
• "To trigger on a specific field of the video signal" on page 114
• "To trigger on all fields of the video signal" on page 115
• "To trigger on odd or even fields" on page 116
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 Type softkey.
3 Press the Trigger Type softkey; then, turn the Entry knob to select Video.
4 Press the Settings softkey, then press the Standard softkey to select the
appropriate TV standard (NTSC).
Video standard Field 1 Field 2 Alt Field
NTSC 1 to 263 1 to 262 1 to 262
PAL 1 to 313 314 to 625 1 to 312
PAL-M 1 to 263 264 to 525 1 to 262
SECAM 1 to 313 314 to 625 1 to 312