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IM 710105-03E
4.3 Changing the Trigger Settings
The trigger settings determine which part of the acquired waveform to display. The main
trigger settings are listed below.
Trigger type
Triggers can be classified into edge triggers and enhanced triggers.
Trigger source
The trigger source is the signal that is used to check for the trigger condition.
Trigger slope
Slope refers to the signal movement, such as from a low level to a high level (rising slope) or
from a high level to a low level (falling slope). When the slope is used as one of the trigger
conditions, it is called a trigger slope. An edge refers to a point where the trigger source slope
passes through the trigger level.
Trigger level
Trigger level refers to the level that the trigger source must pass through to trigger the DLM2000.
With simple triggers such as the edge trigger, the DLM2000 triggers when the trigger source level
passes through the specified trigger level.
Trigger mode
The trigger mode that you select specifies the conditions (timing or count) for updating the
displayed waveforms. If you execute auto setup, the DLM2000 is set to Auto mode.
Trigger position
When you start waveform acquisition, the DLM2000 triggers on the set trigger condition and
displays the waveforms stored in the acquisition memory. By moving the trigger position, the
ratio of the displayed data before the trigger point (the pre-trigger section) and the data after the
trigger point (the post-trigger section) can be changed. The default setting is 50.0% (the screen
center).
If you initialize the DLM2000 settings or execute auto setup, the trigger type is set to
edge trigger (the trigger is set to CH1). With edge triggers, the DLM2000 triggers on the
rising or falling edge of a single input signal.
This section explains how to change the trigger slope and trigger position, with the trigger
type set to edge trigger.
Note
The DLM2000 allows you to use trigger combinations, which are combinations of two triggers.
If the front-panel B TRIG key is illuminated, a combination trigger is enabled.
If you want to trigger the DLM2000 using only an edge trigger or enhanced trigger, check that
the B TRIG key is not illuminated. If the key is illuminated, set Combination to OFF using the B
TRIG menu.
