Rigol MSO2000A Series User Manual page 199

Chapter 8 Protocol Decoding
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 are 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 check error
occurs.
After the decoder is set to none check, the decoding becomes normal.
Note:
are detected at the same time.
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(00000100，LSB)
The check bit detected is 1
Two error marks will be displayed when end frame error and check error
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