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TIP
• When you adjust the horizontal time base, the waveform displayed on the screen will also
change, and the total number of lines containing the decoding information in the event
table will also be changed.
• The displayed decoded data information in the bus is related to the value of the
horizontal time base. Reducing the horizontal time base can help you view the detailed
information.
Export
When the oscilloscope is in "STOP" state, you can export the time and its
corresponding decoded data in the event table.
In Decode menu, click or tap Export, then the save setting interface is displayed. You
can export the data to the internal memory or the external USB storage device (only
when detected) in *.csv format. For details, refer to
Store and Load
.
15.2 RS232 Decoding
RS232 serial bus consists of the transmitting data line (TX) and the receiving data line
(RX).
Figure 15.4 Schematic Diagram of RS232 Serial Bus
In RS232, baud rate is used to represent the transmission rate (namely bits per
second) of the data. You need to set the start bit, data bits, check bit (optional), and
stop bits for each frame of data.
• Start Bit: indicates when to output data.
• Data Bit: indicates the number of data bits actually contained in each frame of
data.
• Check Bit: used to check whether the data are properly transmitted.
Protocol Decoding
DHO4000 User Guide
198
Copyright ©RIGOL TECHNOLOGIES CO., LTD. All rights reserved.
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