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RIGOL Chapter 5 To Trigger the Oscilloscope
5-6 MSO2000A/DS2000A User’s Guide
Trigger Holdoff
Trigger holdoff can be used to stably trigger the complex waveforms. Holdoff time is
the amount of time that the oscilloscope waits 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.
To capture the periodic signal as shown in the following figure (b), you need to set a
proper holdoff time to make each trigger is on the same position. Otherwise, the
signal captured by the oscilloscope might be as shown in the figure (a).
(a) Without Proper Holdoff Time
(b) With Proper Holdoff Time
Figure 5-2 Schematic Diagram of Trigger Holdoff
Press MENU ïƒ Setting ïƒ Holdoff in the trigger control area (TRIGGER) at the
front panel and use the multifunction knob or the navigation knob to modify the
holdoff time (the default is 100 ns) until the waveform triggers stably. The adjustable
range of holdoff time is from 100 ns to 10 s.
Note: Trigger holdoff is not available for Nth edge trigger, video trigger, RS232
trigger, I2C trigger, SPI trigger, USB trigger and CAN trigger.
Trigger Position
Holdoff Time Holdoff Time
Trigger Position
Trigger Position
Trigger Level
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