BNC 835-3 Programmer Manual - Manual (Page 14)

Berkeley Nucleonics
www.Berkeley Nucleonics.com
835-3
Programmer’s Manual v1.0
Page 14 of 37
Hierarchical Command Structure
All SCPI commands, except the common commands, are organized in a hierarchical
structure similar to the inverted tree file structure used in most computers. The SCPI
standard refers to this structure as “the Command Tree.” The command keywords that
correspond to the major instrument control functions are located at the top of the
command tree. The command keywords for the BNC MODEL 835-3 SCPI command set
are shown below.
:ABORt
:DIAGnostic
:DISPlay
:INITiate
:OUTput
SOURce
:STATus
:SYSTem
:TRIGger
:UNIT
All BNC MODEL 835-3 SCPI commands, except the :ABORt command, have one or more
subcommands (keywords) associated with them to further define the instrument function
to be controlled. The subcommand keywords may also have one or more associated
subcommands (keywords). Each subcommand level adds another layer to the command
tree. The command keyword and its associated subcommand keywords form a portion of
the command tree called a command subsystem.
Status System Programming
The BNC MODEL 835-3 implements the status byte register, the Service Request
Enable Register, the Standard Event Status Register, and the Standard Event
Status Enable Register.