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Triggering the Oscilloscope
After a trigger type is selected, the current trigger setting information (including
trigger type, trigger source, and trigger level) is displayed in the trigger information
label at the top of the screen, as shown in the figure below. The information will
change based on the trigger settings.
Source Selection
Click or tap Source drop-down button to select CH1-CH4. For details, refer to
Source
. The selected trigger source is indicated in the trigger information label at the
top of the screen.
Only when you select the channel that has signal inputs as the trigger source, can you
obtain a stable trigger.
Pattern Setting
The following three patterns are available:
•
1: sets the pattern of the channel selected to "1", i.e. the voltage level is higher
than the trigger level of the channel.
•
0: sets the pattern of the channel selected to "0", i.e. the voltage level is lower
than the trigger level of the channel.
•
X: sets the pattern of the channel selected to "X", i.e. this channel is not used as a
part of the pattern. When all channels in the pattern are set to "X", the
oscilloscope will not trigger.
HDO4000 User Guide
86
Figure 8.12 Duration Trigger Setting Menu
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Trigger
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