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Understand 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.
The trigger control area on the front panel includes a knob and three buttons:
LEVEL:
The knob that set the trigger level
50%:
The instant executes button setting the trigger level to the vertical
midpoint between the peaks of the trigger signal
FORCE: Starts an acquisition regardless of an adequate trigger signal. This button
has no effect if the acquisition is already stopped.
MENU:
The button that activates the trigger controls menu.
Copyright 2004 Rigol Electronic
Figure 2-19: Trigger controls
User Manual for DS5000 Series
RIGOL
2-25
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