RIGOL 
 ©   2007  RIGOL  Technologies,  Inc. 
  User‟s Guide for DM3000 Series 
Math Functions Selective 
The DM3000 provides five math functions: Null measurements, Total measurements, 
dB measurements, dBm measurements, and Limit testing. Only one of these math 
functions can be enabled at the same time, and remains in effect until you turn it off 
or change it. 
Press    key, the display shows: 
 
Figure 2- 12 
 
Table 2- 10 Math Functions Menu Function Description 
Reading statistic functions, including: Max, Min, 
Average, and number of measurement. 
The dB measurement is the difference between 
the input signal and a stored relative value. 
The dBm function is logarithmic, and is based on 
a  calculation  of  power  delivered  to  reference 
impedance. 
The limit test function performs pass/fail testing 
with upper and lower limits that you specify. 
Turn on Math function. 
Turn off Math function. 
Save all changes, back to a higher level menu.