Chapter 7 Protocol Decoding    RIGOL 
DS2000E User’s Guide    7-9 
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: Two error marks will be displayed when end frame error and check error 
are detected at the same time.  
 
 
 
 
 
(00000100,LSB) 
The check bit detected is 1