UTD2000 Series User Manual 
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Figure 2-8 Vertical Channel Inverted Settings (Invert: OFF) 
 
 
Figure 2-9 Vertical Channel Inverted Settings (Invert: ON) 
 
2.6 Mathematical operation function 
UTD2000 series DSO support mathematical operation function for the input signals. 
Figure below show the match result for CH1 + CH2 as example.   
 
Figure 2-10 Math Operation