Chapter 2 Front Panel Operation  RIGOL 
User’s Guide for DSA800/E Series   
Zoom In 
 
Set the span to half of its current value. At this point, the signal on the screen is 
zoomed in to observe signal details. 
 
 
Zoom Out 
 
Set the span to twice the current value. At this point, the signal on the screen is 
zoomed out to gain more information about the signal. 
 
 
Last Span 
 
Set the span to the previous span setting.   
 
 
X Scale 
 
Select the scale type of X-axis to Lin or Log. The default is Lin. 
 
Key Points: 
  In Log scale type, the frequency scale of X-axis is displayed in the logarithmic 
form. 
  When the scale type of X-axis is set to Log and any advanced measurement 
function (including T-Power, ACP (Adjacent Channel Power), Chan Pwr 
(Channel Power), OBW (Occupied Bandwidth), EBW (Emission Bandwidth), 
C/N Ratio, Harmo Dist (Harmonic Distortion) and TOI (Third Order 
Intermodulation)) is selected, the instrument switches the scale type of X-axis 
to Lin automatically.