RIGOL  Chapter 11 Protocol Decoding 
11-18  MSO7000/DS7000 User Guide 
 
 
 
 
7. Error expressions in decoding 
In I2C decoding, when ACK (acknowledgement) is 1, ACK error occurs. When 
when the detected ACK is 1, red error report information    (the display form is 
related to the value of the horizontal time base) is dispalyed.