Chapter 6 Operations and Measurements    RIGOL 
MSO4000/DS4000 User’s Guide  6-45 
LA 
 
When using cursor to perform manual measurement on the waveform of the LA 
channel, the display mode is fixed at “X” and cannot be modified (only the X cursors 
are displayed). When different horizontal measurement units are selected, the cursor 
measurement results are different. The measurement results (displayed at the 
upper-left side of the screen) include the following measurement items.  
 
  CurA: the X value at cursor A (X cursor).  
  D15D0: display the logic level values at cursor A (X cursor) in hexadecimal and 
binary forms (D15 to D0 from left to right). For digital channels that are turned 
off, “X” will be displayed, denoting that the level is unknown.  
  CurB: the X value at cursor B (X cursor). 
  D15D0: display the logic level values at cursor B (X cursor) in hexadecimal and 
binary form (D15 to D0 from left to right). For digital channels that are turned off, 
“X” will be displayed, denoting that the level is unknown.  
  △X: the horizontal difference between cursor A and B (X cursors).  
 
The figure below shows the measurement results when the horizontal measurement 
unit is set to “s”.  
 
 
You can use cursor to perform manual measurement on the waveform of the LA 
channel following the steps below.  
 
1.  Turn on the manual measurement function 
Press Cursor  Mode, turn the multi-function knob   to select “Manual” and 
press the knob. You can also press Cursor or Mode continuously to switch to 
“Manual”. At this point, the oscilloscope measures the values at the cursors of 
the LA channel waveforms and displays the measurement results at the 
upper-left side of the screen. When the manual measurement parameters are 
modified, the measurement result will change accordingly.  
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