Rigol 2000 Series User Manual page 205

Chapter 8 Protocol Decoding
(positive polarity) or
If the CS channel is set to CH1 or CH2, you can press Threshold to set the

threshold of the clock channel. The range of the threshold is related to the
vertical scale and vertical position and is from (-5*vertical scale - vertical
position) to (5*vertical scale - vertical position). If the CS channel is set to
any of D0-D15, Threshold will be hidden automatically.
2. SCLK Setting
Press SCLK to enter the clock line setting interface.
Press Channel to select any channel (CH1, CH2 or any channel of D0-D15)

as the clock channel.
Press Slope to set to sample the SDA on the rising or falling edge of the

SCLK.
If the clock channel is set to CH1 or CH2, press Threshold to set the

threshold of the clock channel. The range of the threshold is decided by the
vertical position and scale, and is from (-5*vertical scale - vertical position)
to (5*vertical scale - vertical position). If the clock channel is set to any
channel of D0-D15, Threshold will be hidden automatically.
3. SDA Setting
Press SDA to enter the SDA data line setting interface.
Press Channel to select any channel (CH1, CH2 or any channel of D0-D15)

as the SDA data channel.
Press Polarity to set the polarity of the SDA data line to

(low).
If the data channel is set to CH1 or CH2, press Threshold to set the

threshold of the data channel. The range of the threshold is decided by the
vertical position and scale, and is from (-5*vertical scale - vertical position)
to (5*vertical scale - vertical position). If the data channel is set to any
channel of D0-D15, Threshold will be hidden automatically.
4. Data Bits Setting
Press Data Bits to set the number of bits of each frame of data. The range
available is from 4 to 32. The default is 8.
5. Endian Setting
Press Endian to select "LSB" or "MSB" and the default is "MSB".
MSO2000A/DS2000A User Guide
(negative polarity).
RIGOL
(high) or
8-15