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8-Advanced Function of Oscilloscope
44
Video trigger: Perform video field trigger or line trigger on the standard video signals.
The following describes Edge trigger and Video trigger menus respectively.
8.4.1 Edge Trigger
The Edge trigger is a mode by which trigger occurs at the triggering threshold value of the input
signal edge. With the Edge trigger selected, the trigger happens on the rise or fall edge of the input
signal, shown as the figure 35.
Figure 35: Edge Trigger
The Edge trigger menu is described in the following table.
Function menu Settings Description
Slope
Rising
Falling
Triggering on the rise edge of the signal.
Triggering on the fall edge of the signal.
Trig mode
Auto
Normal
Single
Acquisition of waveforms is possible even if there is no
triggering condition detected.
Acquisition of waveforms can only be done when the
triggering condition is satisfied.
Sampling on a waveform when one trigger is detected, and
then stop sampling.
Coupling
AC
DC
With this mode selected, the DC component is prevented
from passing-though.
All components are allowed.
Holdoff
To go to holdoff menu
8.4.2 Video Trigger
The video trigger type is designed to capture the video signal format, NTSC, PAL or SECAM.
For any other signal type, use the edge trigger.
Figure 36 is the Video Odd Field Trigger. Figure 37 and figure 38 is the Video Line trigger.
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