Rigol DS6000 Series User Manual page 187

7 Protocol Decoding
than 1.5 bit.
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.
(00000100, LSB)
The check bit detected is 1
Wherein, there are odd number of 1 in the 8 bit data 00000100 and the check bit
should be 0. However, check error is generated as the check bit on TX is 1.
After the decoder is set to none check, the decoding becomes normal.
Note: Two error marks will be displayed when end frame error and check error
are detected at the same time.
DS6000 User's Guide
RIGOL
7-9