RIGOL Chapter 5 Trigger
5-20 MSO4000/DS4000 User’s Guide
Nth Edge Trigger
In Nth edge trigger, the oscilloscope triggers on the nth edge that appears after the
specified idle time.
For example, in the waveform as shown in the figure above, the idle time should
fulfill the following formula if the oscilloscope needs to trigger on the second rising
edge appears after the specified idle time.
Wherein,
,
,
and
are the idle times participate in the counting;
is
the specified idle time.
Press MENU (in the trigger control area (TRIGGER) at the front panel) Type, turn
the multi-function knob to select “Nth Edge” and press the knob. You can also
press Type continuously to switch to “Nth Edge” trigger.
At this point, the trigger setting information (include the trigger type, trigger source
and trigger level/threshold level, as shown in the figure below) is displayed at the
upper-right side of the screen and changes with the trigger setting.
Set the Nth edge trigger:
1. Specify the trigger source and adjust the trigger level/threshold level
1) Press Source to select CH1 to CH4 or D0 to D15 (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) Turn TRIGGER
LEVEL to adjust the trigger level (when the trigger
P1
P2
P3
M
Edge Type: RisingEdge
Number of Edges: 2
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