Chapter 5 Trigger RIGOL
DS4000E User’s Guide 5-13
Runt Trigger
Runt trigger is used to trigger pulses that pass one trigger level but fail to pass the
other one.
For this oscilloscope, positive runt pulses are defined as pulses that pass the lower
limit of the trigger level but fail to pass the upper limit of the trigger level; negative
runt pulses are defined as pulses that pass the upper limit of the trigger level but fail
to pass the lower limit of the trigger level, as shown in the figure below.
Press MENU (in the trigger control area (TRIGGER) at the front panel) Type, turn
the multi-function knob to select “Runt” and press the knob. You can also press
Type continuously to switch to “Runt” trigger.
At this point, the trigger setting information (include the trigger type, trigger source
and trigger level difference (namely the difference between high level and low level),
as shown in the figure below) is displayed at the upper-right side of the screen and
changes with the trigger setting.
1. Specify the trigger source
Press Source to select CH1 to CH4 (please refer to “Trigger Source”). The
trigger source currently selected is displayed at the upper-right side of the
screen.
Note: Channels that are turned off can also be selected as the trigger source.
2. Adjust the trigger level
In runt trigger, you need to set the trigger level upper limit and trigger level
lower limit which correspond to the trigger labels
and respectively.
Select the trigger level to be adjusted
Upper Limit of the
Trigger Level
Lower Limit of the
Trigger Level
Positive Runt Pulse
Negative Runt Pulse
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