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Chapter 5 To Trigger the Oscilloscope
RIGOL
Trigger Holdoff
Trigger holdoff can be used to stably trigger the complex waveforms. Holdoff time is
the amount of time that the oscilloscope waits after a trigger before re-arming the
trigger module. The oscilloscope will not trigger even if the trigger condition is met
during the holdoff time and will only re-arm the trigger module after the holdoff time
expires. For example, to stably trigger the repeat pulse series as shown in the figure
below, the holdoff time should be set to a value greater than T1 and lower than T2.
Holdoff Time
Trigger Positions
T1
T2
Figure 5-2 Schematic Diagram of Trigger Holdoff
Press MENU (in the trigger control area (TRIGGER) on the front panel) Setting
Holdoff; then, turn
or the inner knob of the navigation knob to modify the
holdoff time at a relatively smaller step or turn the outer knob of the navigation knob
to adjust the holdoff time (the default is 100 ns) at a relatively larger step until the
trigger becomes stable. The adjustable range is from 100 ns to 10 s.
Note: For DS2000E, the trigger types that support trigger holdoff include edge
trigger, pulse trigger, runt trigger, windows trigger, slope trigger, pattern trigger,
delay trigger, and duration trigger.
DS2000E User's Guide
5-5
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