Trigger Holdoff - Rigol MSO4000 Series User Manual

Chapter 5 Trigger

Trigger Holdoff

The trigger holdoff can be used to set the period of time that the oscilloscope waits
(namely the holdoff time) before re-arming the trigger circuitry after a trigger. The
oscilloscope will not trigger until the holdoff time expires. Trigger holdoff can be used
to stably trigger complex repeat waveforms (there are multiple edges (or other
events) within a single repeating period of the waveform, such as pulse series).
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.
Press MENU (in the trigger control area (TRIGGER) at the front panel)  Setting
 Holdoff; then, turn the multi-function knob
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 at a relatively larger step
until the trigger becomes stable. The adjustable range is from 100 ns to 10 s. The
default is 100 ns.
Note:
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MSO4000/DS4000 User's Guide
800.544.2843
Holdoff Time
t1
t2
Trigger types that support trigger holdoff include "Edge Trigger", "Pulse
Trigger", "Runt Trigger", "Slope Trigger" and "Pattern Trigger".
The larger the rotation amplitude of the outer knob of the navigation knob is,
the faster the variation of the value will be. When you need to adjust the holdoff
time within a relatively larger range, this function can help you quickly finish the
setting.
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Trigger Position
or the inner knob of the
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