Agilent Technologies 7000B Series - To Trigger on a Specific Field of the Video Signal; Figure 15 Triggering on Field

Triggering 4
InfiniiVision 7000B Series Oscilloscopes User’s Guide 145
To trigger on a specific field of the video signal
To examine the components of a video signal, trigger on either Field 1 or
Field 2 (available for interleaved standards). When a specific field is
selected, the oscilloscope triggers on the rising edge of the first serration
pulse in the vertical sync interval in the specified field (1 or 2).
1 Press the [Trigger] key; then, select TV.
2 Press the Settings softkey, then press the Standard softkey to select the
appropriate TV standard.
3 Press the Mode softkey and select Field1 or Field2.
Figure 15 Triggering on Field 1