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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
Trigger
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.
The Left/Right arrow key indicates moving left/right to switch the channel pattern.
"All" indicates all bits. Select a pattern for a channel, then click or tap All. The patterns
of all the other channels will be set to the currently selected pattern.
Trigger Condition
Set the trigger condition in the When item.
• >: triggers when the duration of the pattern is greater the preset time. Click or
tap the input field of Lower to set the lower limit of the duration of the pattern
with the pop-up numeric keypad. You can also use the corresponding
multipurpose knob to set the value. The available range is from 1 ns to 10 s.
• <: triggers when the duration of the pattern is smaller than the preset time. Click
or tap the input field of
Upper to set the upper limit of the duration of the
pattern. You can also use the corresponding multipurpose knob to set the value.
The available range is from 1 ns to 10 s.
• < >: triggers when the duration of the pattern is smaller than the upper limit of
the preset time and greater than the lower limit of the preset time. Click or tap
the input field of Upper to set the upper limit of the duration of the pattern, and
the range is from 1.01 ns to 10 s. Click or tap the input field of Lower to set the
lower limit of the duration of the pattern, and the range is from 1 ns to 9.9 s. You
Triggering the Oscilloscope
DHO1000 User Guide
84
Copyright ©RIGOL TECHNOLOGIES CO., LTD. All rights reserved.
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