Remote Operation
5.1
INTRODUCTION
Section 5
Model 395 finnware supports several industry standards and specifications (SCPI,
IEEE 488.2, RS-232, and IEEE 488.1) in remote operation.
The
SePI
Standard, frrst published in 1990, is layered on top
of
the IEEE 488.2
Standard. SCPI defines program messages, response messages, and data formats
that are consistent across aIl instruments, regardless
of
manufacturer. The goal
of
these definitions is to reduce ATE prograrn developmenllinte. SCPI is designed
to be layered on top
of
the interface independent portion
of
IEEE 488.2.
It
is
independent
of
the controIler to instrument interface.
In
the simplest sense, the IEEE 488.2 standard defines the syntax
of
a command
language while the SCPI standard defines the vocabulary.
This standard defines communication protocols necessary to effect application
independent device-dependent message exchanges and defines common commands
and characteristics useful in instrument system applications.
Among the items this standard defines are standard message handling protocols
including errorhandling, unambiguous program message and response message
syntactic structures and standard status reporting structures.
Appendix C contains additional information for the Standard Commands for
Programmable Instrumentation (SCPI) that is notcovered in detail in this section
of
the manual. First is a number
of
figures representing the SCPI Command set
of
the Model 395 given in a "Command Tree" rather than the common "Command
Table" format foIlowed by the "SCPI Conformance Information" required
by
the
specification. Finally, this appendix includes the common "Command Table"
format.
Remote Operation
5-1
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