SASLab Manual
    
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                  Main window : File > Real-Time Spectrum 
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The real-time spectrum display is launched from the main window drop-down menu File > Real-time spectrum.... 
 
 
  
 
It is basically a curve window with a number of additional options.  
 
The real time display can be started from the drop-down menu File > Start real time spectrum or by clicking at the   button. 
  
The drop-down menu item File > Real time spectrum setup allows to set the FFT length, window type and whether the magnitude should be displayed in logarithmic or linear scale (option logarithmic power spectrum): 
 
  
 
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