Scpi Command Structure And Syntax - R&S AFQ100A Operating Manual

R&S AFQ100A

SCPI Command Structure and Syntax

The commands consist of a so-called header and, in most cases, one or more parameters. The header
and parameter are separated by a white space (ASCII code 0 to 9, 11 to 32 decimal, e.g. blank). The
headers may consist of several key words. Queries are formed by directly appending a question mark
to the header.
Note:
The commands used in the following examples are not in every case implemented in the instrument.
Common Commands
Instrument control
commands
The tree structure of the command system SOURce.
Multiple key words
1401.3084.32
Common commands consist of a header preceded by an asterisk "*" and one
or more parameters, if any.
Examples:
*RST
*ESE 253
*ESR?
Hierarchy
Example: SOURce
Some key words occur on several levels within one command system. Their
effect depends on the structure of the command, i.e. on the position in the
command header they are inserted in.
SCPI Command Structure and Syntax
, resets the device
RESET
EVENT STATUS ENABLE
status enable register
EVENT STATUS QUERY
event status register.
Device-specific commands are of hierarchical
structure. The different levels are represented by
combined headers. Headers of the highest level
(root level) have only one key word. This key word
denotes a complete command system.
This key word denotes the command system
SOURce.
For commands of lower levels, the complete path
has to be specified, starting on the left with the
highest level, the individual key words being
separated by a colon ":".
5.16
, sets the bits of the event
, queries the contents of the
E-3