HP 54620A, Programmer'S Manual

Page: 52 / 92

The command tree
The following command tree shows all of the logic analyzer commands and
their relationships to each other. The IEEE 488.2 common commands are not
listed as part of the command tree because they do not affect the position of
the parser within the tree. When a program message terminator (<NL>,
linefeed—ASCII decimal 10) or a leading colon (:) is sent to the instrument,
the parser is set to the “root” of the command tree.
Command Types
The commands for this instrument can be categorized into three types:
•
Common commands
•
Root level commands
•
Subsystem commands
Common commands These commands are defined by IEEE 488.2, and
control some functions that are common to all IEEE 488.2 instruments.
Common commands are independent of the tree, and do not affect the
position of the parser within the tree. These commands differ from root level
commands in that root level commands place the parser back at the root of
the command tree.
Example:
*RST
Root level commands These commands control many of the basic
functions of the instrument, and reside at the root of the command tree.
Root level commands are always parsable if they occur at the beginning
of a program message, or are preceded by a colon.
Example:
:AUTOSCALE
Programming and Documentation Conventions
The command tree
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