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Chapter 4, GPIB Commands
Introduction
Introduction
The PCS Interface is controlled only by GPIB commands from the Test Set’s
internal IBASIC controller or the user-supplied external controller.
The GPIB commands for the PCS Interface comprise common commands and
subsystem commands.
NOTE:
The information in this chapter does
not
apply when an Agilent 8924C is controlling the
PCS Interface over the serial port.
Common Commands
An asterisk (*) is always placed in front of a common command. These common
commands conform to IEEE 488.2.
Subsystem Commands
Subsystem commands are hierarchies composed of multiple commands
connected by colons. The hierarchies are also called “command trees.”
Subsystem Command Trees
The command at the base of a subsystem command tree is called the
root
command
, or simply the
root
. (This is similar to the terminology used for the
directory path of DOS files.) To indicate the command at the beginning of the
tree, the
path
from the root must be specified. Immediately after the power is
turned on or a preset is carried out, the root is specified as the current path. The
following method can be used to change this path’s specification.
Program Message Terminator
A program message terminator such as
<new line>
returns the current path to the root.
Colon (:)
Inserting a colon between two commands causes the current
path to branch one level down. If a colon is placed in front of a
command it indicates that the command is the root command.
Semicolon (;)
A semicolon indicates the separation of two groups of com-
mands. A semicolon does not change the specification of the
current path.
An example of how colons and semicolons are used within a command tree is
shown in figure 27 on page 93.
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Страница 14: ...Contents 14 Error Message 154 Glossary 161...
Страница 30: ...30 Chapter 1 General Information Other Information...
Страница 123: ...123 5 S pecifications Specifications...
Страница 137: ...137 A F requency Conversion Tables Appendix A Frequency Conversion Tables...
Страница 140: ...140 Appendix A Frequency Conversion Tables Frequency Conversion for Signal Generation...
Страница 141: ...141 B M anual Changes Appendix B Manual Changes...
Страница 164: ...Index 164 TX definition 162 TX subsystem 114 TX RX port 25 typical 124 U upconverter definition 162 W warm up time 124...