Sets all the measurement parameters. 
   
 
Performs math operations (statistic, P/F, dBm, dB, REL) for measured 
results and displays real-time measurements in trend graph and 
histogram. 
 
 
Provides auto, single, external and level trigger sources; enables to 
set the reading hold function, samples per trigger, delay time before 
reading and edge of the trigger input signal as well as the trigger 
output parameter. 
   
 
Saves, recalls and deletes data and parameter files from both internal 
memory and external USB devices.  
   
 
Sets the command set, interface parameters and system information, 
tests the multimeter and displays error messages. 
   
 
Provides common help information and the method to use built-in 
help. The multimeter allows users to quickly recall the help 
information about any front panel keys and menu softkeys.  
 
9.  Range/Direction Keys 
 
 
Enables auto range. 
   
   
  Configures the measurement parameters. 
  Selects the digit position while entering a parameter. 
   
 
  
  Increases or decreases the measurement range. 
  Enters desired numeric value while setting a parameter. 
  Pages up or down.