Tabor Electronics 5064, User Manual

Page: 224 / 369

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5-3
What’s in This
Chapter
This Chapter lists and describes the set of SCPI-compatible
(Standard Commands for Programmable Instruments) remote
commands used to operate the 2074. To provide familiar formatting
for users who have previously used the SCPI reference
documentation, the command descriptions are dealt with in a similar
manner. In particular, each sub-system's documentation starts with
a short description, followed by a table showing the complete set of
commands in the sub-system; finally the effects of individual
keywords and parameters are described. Complete listing of all
commands used for programming the 2074 is given in Table 5-1.
Introduction to
SCPI
Commands to program the instrument over the GPIB are defined by
the SCPI 1993.0 standard. The SCPI standard defines a common
language protocol. It goes one step further than IEEE-STD-488.2
and defines a standard set of commands to control every
programmable aspect of the instrument. It also defines the format of
command parameters and the format of values returned by the
instrument.
SCPI is an ASCII-based instrument command language designed
for test and measurement instruments. SCPI commands are based
on a hierarchical structure known as a tree system. In this system,
associated commands are grouped together under a common node
or root, thus forming subsystems.
Part of the OUTPut subsystem is shown below to illustrate the tree
system:
:
OUTPut
:FILTer
[:LPASs] {NONE|25M|50M|ALL}
[:STATe] OFF | ON
OUTPut is the root keyword of the command; FILTer and STATe
are second level keywords. LPASs is third level keyword. A colon ( :
) separates a command keyword from a lower level keyword.