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Triggering the Oscilloscope
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 five 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.
•
•
The Left/Right arrow key indicates moving left/right to switch the channel pattern.
"All" indicates all bits. Select a pattern for a channel and then click or tap All. The
patterns of all the other channels will be set to the currently selected pattern. The
pattern setting is as shown in the figure below.
Only one edge (rising or falling edge) can be specified in the pattern. If one edge item
is currently defined and then another edge item is defined in another channel in the
pattern, then a prompt message "Invalid input" is displayed.
Trigger Mode
In Sweep, select Auto, Normal, or Single as the trigger mode. For details, refer to
Trigger Mode
HDO4000 User Guide
84
: sets the pattern to the rising edge of the channel selected.
: sets the pattern to the falling edge of the channel selected.
.
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Trigger
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