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8.4. How to Set the Trigger System
Trigger determines when the software starts to acquire data and display waveform. Once trigger is set
correctly, it can convert the unstable display to meaningful waveform.
When the software starts to acquire data, it will collect enough data to draw waveform on left of trigger
point. It continues to acquire data while waiting for trigger condition to occur. Once it detects a trigger it
will acquire enough data continuously to draw the waveform on right of trigger point.
Click
to show Function menu, choose "Trigger".
You can also click
in the right bottom window to show it.
8.5. Trigger Control
The oscilloscope provides two trigger types: single trigger and alternate trigger.
Single trigger: Use a trigger level to capture stable waveforms in two channels simultaneously.
Alternate trigger: Trigger on non-synchronized signals.
The Single Trigger and Alternate Trigger menus are described respectively as follows:
Single trigger
1. In Trigger menu, choose "Single" (the chosen label has a
mark).
2. Choose Source.
3. Choose Mode.
Single trigger has four modes:
edge trigger, video trigger, slope trigger and pulse trigger.
Edge Trigger
:
It occurs when the trigger input passes through a specified voltage level with
the specified slope.
Video Trigger:
Trigger on fields or lines for standard video signal.
Slope Trigger:
The oscilloscope begins to trigger according to the signal rising or falling
speed.
Pulse Trigger
:
Find pulses with certain widths.
The four trigger modes in Single Trigger are described respectively as follows:
