R&S PR100 User Manual
Abbreviation Meaning
ASCII American Standard Code for Information Interchange
NA Not Applicable
SCPI Standard Commands for Programmable Instruments
ESE Event Status Enable
ESR Event Status Register
IP Internet Protocol
IST Individual STatus
LSB Least Significant Byte
MAV Message AVailable
MR Monitoring Receiver
MSB Most Significant Byte
NTR Negative TRansition
PRE Parallel Poll Register Enable
PTR Positive TRansition
SRE Service Request Enable
SRQ Service ReQuest
STB STatus Byte
UDP User Datagram Protocol
9 SCPI Commands
9.1 SCPI introduction
SCPI (Standard Commands for Programmable Instruments) describes a
standard command set for programming devices, irrespective of the type of
device or manufacturer. The goal of the SCPI consortium is to standardize the
device-specific commands to a large extent. For this purpose, a model was
developed that defines the same functions for different devices. Command
systems were generated that are assigned to these functions. Thus it is
possible to address the same functions with identical commands. The
command systems are of a hierarchical structure. Figure 1 illustrates this tree
structure using a section of command system SENSe which operates the
sensor functions of the devices. The other examples regarding syntax and
structure of the commands are derived from this command system.
SCPI is based on standard IEEE 488.2, i.e. it uses the same syntactic
elements as well as the common commands defined in this standard. Part of
the syntax of the device responses is defined with greater restrictions than in
standard IEEE 488.2 (see Section 9.1.4).
The commands consist of a so-called header and, in most cases, one or more
parameters. Header and parameter are separated by a "white space" (= any
number of space characters, ASCII code 32 decimal). The headers may
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