Rigol MSO4000 Series User Manual page 251

Chapter 8 Protocol Decoding
9. Error expressions during decoding
In I2C decoding, when ACK (acknowledgement) is 1, ACK error occurs. When
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Address Information (Write Address)
the decoding is correct, the ACK information is displayed as turquoise patch;
when the detected ACK is 1, red error mark (
is related to the horizontal time base and the display format of the bus) is
dispalyed.
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15
10 20
5 25
0 30
, , or ; the display form
The detected ACK is 1
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SCLK
SDA
8-19