Chapter 6 Operations and Measurements    RIGOL 
MSO4000/DS4000 User’s Guide  6-29 
the number of points being measured. 
9.  Vrms-1: the root mean square value of the voltage values of the waveform 
points within a single period. The operation formula is as shown in the formula 
above. 
10. Overshoot: the ratio of the difference of the maximum value and top value of 
the waveform to the amplitude value. 
11. Preshoot: the ratio of the difference of the base value and minimum value of 
the waveform to the amplitude value. 
 
 
Area Parameters 
 
1.  Area: the horizontal axis denotes time and the vertical axis denotes waveform 
amplitude. The oscilloscope calculates the area (namely the integral of the time 
and amplitude) of the waveform. The unit is volt-second. The area of the 
waveform above the zero reference (namely the vertical offset) is positive and 
the area of the waveform below the zero reference is negative. The area 
measured is the algebraic sum of the area of the waveform within the current 
measurement range. 
 
2.  Per.Area: period area; the horizontal axis denotes time and the vertical axis 
denotes waveform amplitude. The oscilloscope calculates the area (namely the 
product of time times amplitude) of a single period of waveform. The units are 
volt-second. The area of the waveform above the zero reference (namely the 
vertical offset) is positive and the area of the waveform below the zero 
reference is negative. The area measured is the algebraic sum of the area of the 
single period waveform.  
 
 
 
 
 
 
 
 
 
 
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