Rigol MSO4000 Series User Manual page 147

Chapter 5 Trigger
2. Specify the bus polarity
3. Specify the trigger condition
MSO4000/DS4000 User's Guide
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to "Trigger Level/Threshold Level"). The current trigger level/threshold
level is displayed at the upper-right side of the screen.
Press Polarity to set the polarity of data transmission to "Normal" or "Invert".
The default is "Normal".
Press When and turn the multi-function knob
condition. You can also press When continuously to switch the current trigger
condition.
Start: trigger on the start of a frame.

Error: trigger when error frame is detected.

After this trigger condition is selected,
― press Stop Bit to select "1 bit" or "2 bit".
press Even-Odd and turn the multi-function knob
―
"Odd" or "Even". You can also press Even-Odd continuously to switch
the current check type.
The oscilloscope determines error frames according to this setting.
Check Error: trigger when check error is detected.

When this trigger condition is selected,
press Stop Bit to select "1 bit" or "2 bit".
―
― press Even-Odd and turn the multi-function knob
or "Even". You can also press Even-Odd continuously to switch the
current check type.
The oscilloscope determines check error according to this setting.
Data: trigger on the last bit of the preset data bits and even-odd check bits.

When this trigger condition is selected,
― press Data Bits and turn the multi-function knob
"6 bit", "7 bit" or "8 bit". You can also press Data Bits continuously to
switch the current data bits.
― press Data and turn the multi-function knob
data.
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10 20
5 25
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to select the desired trigger
to select "None",
to select "Odd"
to select "5 bit",
to select the desired
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