RIGOL  Chapter 8 Protocol Decoding 
8-4  MSO4000/DS4000 User’s Guide 
Press Threshold to open the threshold setting submenu. In this submenu, 
 
1)  Select the specified analog channel 
Press Channel and turn the multi-function knob   to select the analog 
channel (CH1 to CH4) that needs to specify the threshold. You can also 
press Channel continuously to switch the channel currently selected.  
 
2)  Adjust the threshold 
  Press TTL, COMS and ECL respectively to set the threshold of the 
channel currently selected to TTL, CMOS and ECL levels. 
  Press Threshold and turn the multi-function knob   to adjust the 
threshold (the default is 0 V) of the channel currently selected. 
Pressing the multi-function knob 
 can qucikly reset the threshold of 
the channel to 0 V. 
 
Note: The adjustable range of the threshold of the analog channel is 
related to the current vertical scale and vertical position of the channel. The 
setting method has no effect on the threshold range. The adjustable range 
is from -4*Vertical Scale - Vertical Position to 4*Vertical Scale - Vertical 
Position.When the threshold selected exceeds the adjustable range, it will 
be automatically limited within the adjustable range.  
 
When modifying the threshold of the analog channels, a dotted line (in the 
same color as the channel) showing the current threshold level will be 
displayed on the screen. It will disappear in about 2 s after you stop 
modifying the threshold.  
 
5.  Specify the display format 
Press Format and turn the multi-function knob   to set the display format of 
the bus data to Hex, Decimal, Binary or ASCII. You can also press Format 
continuously to switch the current display format. 
 
Note: When the event table is turned on, the decoding data in the event table 
will also be displayed in the format selected here.  
 
6.  Adjust the vertical offset 
Press Offset and turn the multi-function knob   to adjust the vertical position 
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