Rigol VS5000 Series User Manual page 66

Trigger Modes
The oscilloscope provides seven trigger modes: Edge, Pulse, Slope, Video,
Alternative, Pattern and Duration trigger (for VS5000D only).
Edge:
An edge trigger occurs when the trigger input passes through a specified voltage
level in the specified slope direction.
Pulse:
Use this trigger type to catch pulses with certain pulse width.
Video:
Use video trigger on fields or lines for standard video signals.
Slope:
The oscilloscope begins to trigger according to the signal rising or falling speed.
Alternative:
Trigger on non-synchronized signals
Pattern:
To trigger through detecting specified codes.
Duration:
To trigger within a specified time on the conditions of a specified code.
2-34 © 2008 RIGOL Technologies, Inc
User's Guide for VS5000 Series