Chapter 7 Protocol Decoding RIGOL
DS4000E User’s Guide 7-11
The decoded data information displayed in the bus is related to the
horizontal time base. You can view the detailed information by
reducing the horizontal time base.
2) If a USB storage device is currently connected to the instrument, you can
press Export to export the decoded data list to the external USB storage
device in CSV format.
11. Error expressions during decoding
Check error and end of frame error may occur during RS232 decoding. When
decoding error occurs, red error mark
or (the display form is related to the
horizontal time base) is displayed.
Check Error
When a check bit error is detected during the decoding, a red error mark
will be displayed. For example, when the transmitting terminal is set to
none check and the decoder is set to odd check, the following check error
occurs. Wherein, there is an odd number (1) of 1 in the 8-bit data 00000100
and the check bit should be 0. But, the check bit detected on the TX is 1;
thus a check error occurs.
After the decoder is set to none check, the decoding shows no error.
The check bit detected is 1
(00000100, LSB)
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