User Manual

RIGOL Chapter 5 To Trigger the Oscilloscope
5-14 MSO2000A/DS2000A User’s Guide
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.
Figure 5-4 Runt Trigger
Trigger Type:
Press Type, rotate to select “Runt” and press down . At this point, the trigger
setting information is displayed at the upper right corner of the screen. For example,
. The trigger type is runt trigger; the trigger source is CH1; the
difference between the upper limit of trigger level and the lower limit of trigger level
is 3.06 V.
Source Selection:
Press Source to switch the signal source list between CH1 and CH2. For the details,
please refer to the introduction in “
Trigger Source”. The current trigger source is
displayed at the upper right corner of the screen.
Note: Select channel with signal input as trigger source to obtain stable trigger.
Pulse Polarity:
Press Polarity to select the pulse polarity of runt trigger.
 : positive polarity. The instrument triggers on the positive runt pulse.

: negative polarity. The instrument triggers on the negative runt pulse.
Upper Limit of the
Trigger Level
Lower Limit of the
Trigger Level
Positive Runt Pulse
Negative Runt Pulse