Command Format: 
:calculate:REL:state? 
:calculate:REL:state□{ON|OFF} 
 
Function: 
The command queries or sets the enable state of REL operation. 
 
Explanations: 
:calculate:REL:state?: Enable or disable REL operation. 
:calculate:REL:state□{ON|OFF}: Set the enable state of REL operation. 
   
Example: 
Disable REL operation: 
:calculate:statistic:state□OFF 
 
 
9.  :calculate:DB? 
Command Format: 
:calculate:DB? 
 
Function: 
The command queries dB value. 
 
Explanations: 
This command is available only when dB operation is on. 
 
Return Format: 
The query returns current dB value. 
 
 
10. :calculate:DB:reference 
Command Format: 
:calculate:DB:reference? 
:calculate:DB:reference□{<range>|MIN|MAX|DEF} 
 
Function: