MTX100 MPEG Recorder & Player User Manual
3Ć65
Syntax
This section contains information on the Standard Commands for Programmable
Instruments (SCPI) and IEEE 488.2 Common Commands you can use to
program your MTX100. The information is organized in the following subsec-
tions:
SCPI Commands and Queries
SCPI is a standard created by a consortium that provides guidelines for remote
programming of instruments. These guidelines provide a consistent program-
ming environment for instrument control and data transfer. This environment
uses defined programming messages, instrument responses, and data format
across all SCPI instruments, regardless of manufacturer. The MTX100 uses a
command language based on the SCPI standard.
The SCPI language is based on a hierarchical or tree structure (see Figure 3-28)
that represents a subsystem. The top level of the tree is the root node; it is
followed by one or more lower-level nodes.
Figure 3Ć28: Example of SCPI subsystem hierarchy tree
You can create commands and queries from these subsystem hierarchy trees.
Commands specify actions for the instrument to perform. Queries return
measurement data and information about parameter settings.
SCPI commands are created by stringing together the nodes of a subsystem
hierarchy and separating each node by a colon.
In Figure 3-28, RECord is the root node and TARGet, TYPE, SIZE, and TIME
are lower-level nodes. To create a SCPI command, start with the root node
RECord and move down the tree structure adding nodes until you reach the end
of a branch. Most commands and some queries have parameters; you must
include a value for these parameters. If you specify a parameter value that is out
of range, the parameter will be set to a default value.
Creating Commands
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