RIGOL DS1000B - Manual (Page 63)

RIGOL
User’s Guide for DS1000B Series 2-33
To Set up the Trigger System
The trigger determines when the oscilloscope starts to acquire data and display a
waveform. When a trigger is set up properly, it can convert unstable displays or blank
screens into meaningful waveforms.
When the oscilloscope starts to acquire a waveform, it collects enough data so that it
can draw the waveform to the left of the trigger point. The oscilloscope continues to
acquire data while waiting for the trigger condition to occur. After it detects a trigger,
the oscilloscope continues to acquire enough data so that it can draw the waveform
to the right of the trigger point.
Press MENU button to enter trigger system setting interface.
Figure 2-38 Trigger system interface
DS1000B provides five trigger modes: Edge, Pulse, Video, Pattern and Alternative.
Edge: An edge trigger occurs when the trigger input passes through a specified
voltage level in the specified slope direction.
Pulse: Use this trigger mode to catch pulses with certain pulse width.
Video: Use video trigger mode on fields or lines for standard video signals.
Pattern: Recognising trigger by searching specified code.
Alternative: Trigger on non-synchronized signals.