SCPI Command Reference 
 
M370430-01  Rev B  A-3 
SCPI Command Hierarchy 
SCPI is an ASCII-based command language designed for use in 
test and measurement equipment. The command structure is 
organized around common roots, or nodes, which are the building 
blocks of SCPI subsystems. An example of a common root is 
CALibration, and some of the commands that reside in the 
CALibration subsystem are: 
[:]CALibration  
[:OUTPut] 
[:VOLTage] 
[:DATA] <NR1>  
:CURRent 
[:DATA] <NR1> 
CALibration is the root keyword of the command. OUTPut is a 
second-level keyword, and VOLTage and DATA are third-level 
keywords. A colon (:) is used to separate a command keyword 
from a lower-level keyword.