Instructions

Chapter 5 To Trigger the Oscilloscope RIGOL
MSO5000-E User Guide 5-33
Figure 5-13 Schematic Diagram of RS232 Protocol
Trigger Type:
Press Type, and then rotate the multifunction knob to select "RS232". Press
down the knob to select the trigger type. Then, the current trigger setting
information is displayed at the upper-right corner of the screen, as shown in the
figure below. You can also press Type continuously to select the trigger type or
enable the touch screen to tap the desired trigger type and select it.
Source:
Press Source to open the signal source list and select CH1-CH2 or D0-D15. For
details, refer to descriptions in "
Trigger Source". The current trigger source is
displayed at the upper-right corner of the screen.
Note: Only when we select the channel (that has been input with signals) as the
trigger source, can we obtain a stable trigger.
Trigger Condition:
Press When to select the desired trigger condition. Rotate the multifunction knob
to select the desired trigger condition, then press down the knob to select it. You
can also press When continuously or enable the touch screen to select it.
 Start: triggers on the start frame position.
 Error: triggers when an error frame is detected.
 Check Error: triggers when a check error is detected.
 Data: triggers on the last bit of the preset data bits. Press Data, then rotate the
multifunction knob
or use the numeric keypad to set the data of RS232
trigger.
Data Bits:
Indicate the number of bits per frame. Press More  Data Bits, then rotate the
multifunction knob
to select the desired data bits. Then press down the knob to
select. You can also press Data Bits continuously or enable the touch screen to
select the data bits. The available data bits include "5 Bits", "6 Bits", "7 Bits", and "8
Bits".
Stop Bit:
Indicate when to stop outputting. Press More  Stop Bit, then rotate the
multifunction knob
to select the desired stop bit. Then press down the knob to
select it. You can also press Stop Bit continuously or enable the touch screen to
select the stop bit. The available stop bit include "1 Bit", "1.5 Bits", and "2 Bits".
Start Bit
Data Bits
Check Bit
Stop Bit