Chapter 8 Protocol Decoding    RIGOL 
MSO2000A/DS2000A User Guide  8-15 
(positive polarity) or   (negative polarity). 
  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   (high) or   
(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".