Scpi command hierarchy, Scpi command hierarchy -4 – Agilent Technologies Agilent E5250A User Manual
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Agilent E5250A User’s Guide, Edition 11
Programming the E5250A
SCPI Programming Basics
SCPI Command Hierarchy
The SCPI commands use a hierarchical structure for subsystem commands similar 
to a file system. For example, in :ROUT:CONN:RULE command, the hierarchy is 
as follows:
ROUT
root
CONN
sub-level 1
RULE
sub-level 2
The colon at the beginning of the command means root. 
The colons between two command keywords means moving down to a lower level.
NOTE
Using a Semicolon to Reduce Typing
A semicolon enables two commands to be sent on the same line. 
For example, :ROUT:CONN:RULE ALL,FREE;SEQ ALL,BBM is the same as 
the following two commands:
:ROUT:CONN:RULE ALL,FREE
:ROUT:CONN:SEQ ALL,BBM
So, using a semicolon reduces typing and simplifies the program. 
A command terminator (such as carriage return) resets the path to root.