166 Agilent InfiniiVision 3000 X-Series Oscilloscopes User's Guide
10 Triggers
To set up Generic video triggers
When Generic (available with the DSOX3VID extended video triggering
license) is selected as the Video trigger Standard, you can trigger on custom
bi- level and tri- level sync video standards. The Video Trigger Menu
changes as follows.
1 Press the Time > softkey; then, turn the Entry knob to set the time to
greater-than the sync- pulse width so that the oscilloscope synchronizes
to the vertical sync.
2 Press the Edge # softkey; then, turn the Entry knob to select the Nth
edge after after vertical sync to trigger on.
3 To enable or disable the horizontal sync control, press the first
Horiz Sync softkey.
• For interleaved video, enabling the Horiz Sync control and setting the
Horiz Sync adjustment to the sync time of the probed video signal
allows the Edge # function to count only lines and not double count
during equalization. Additionally, the Field Holdoff can be adjusted so
that the oscilloscope triggers once per frame.
• Similarly, for progressive video with a tri-level sync, enabling the
Horiz Sync control and setting the Horiz Sync adjustment to the sync
time of the probed video signal allows the Edge # function to count
only lines and not double count during vertical sync.
When the horizontal sync control is enabled, press the second Horiz Sync
softkey; then, turn the Entry knob to set the minimum time the
horizontal sync pulse must be present to be considered valid.
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.
To Next Page
Loading...
