Invert trace
Adjust trace speed
Live trace 
 
 
 
Flip 
Switches 
Rotaries 
 
 
 
  Assigning a measurement 
  On freeze the Doppler Calc package will be activated 
 
 
 
 
  Assign a measurement by making a selection from the touch screen, i.e. Uterine artery 
  Select auto trace 
  Select trace above (upper), below (lower), both – this could be a flip switch below touch 
screen or a soft key on the touch screen 
 
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