Rs232 Trigger; Figure 8.24 Schematic Diagram Of Rs232 Protocol; Figure 8.25 Rs232 Trigger Setting Menu - Rigol DHO900 User Manual

8.7.13

RS232 Trigger

RS232 bus is a serial communication mode used in data transmission between PCs or
between a PC and a terminal. In RS232 serial protocol, a character is transmitted as a
frame of data. The frame consists of 1 start bit, 5-8 data bits, 1 check bit, and 1-2 stop
bits. Its format is as shown in the figure below. This series oscilloscope triggers when
detecting the start frame, error frame, check error, or the specified data of the RS232
signal.
1 bit
Start Bit
Trigger Type
Click or tap the drop-down button of Type to select "RS232".
After a trigger type is selected, the current trigger setting information (including the
trigger type, source, and 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.
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5~8 bits
Data Bit

Figure 8.24 Schematic Diagram of RS232 Protocol

Figure 8.25 RS232 Trigger Setting Menu

Triggering the Oscilloscope
1 bit 1~2 bits
Check Bit Stop Bit
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