Command Structure; Common Commands; Root Level Commands; Subsystem Commands - HP 54501A Programming Reference Manual

Command
Structure
The HP 54501A programming commands are divided into three
types:
common
commands, root level commands, and
subsystem commands. A
programming command tree
is shown in figure 4-1.
Common
The
common commands
are the commands defined
by IEEE
488.2.
Commands
These commands control some functions that are common to all
IEEE
488.2
instruments.
Sending the common commands do not take the
instrument out of
a
selected subsystem.
ROOt L6Vel
The root level commands control many of the basic functions of the
Commands instrument.
Subsystem
There
are several subsystems in this
instrument. Only one subsystem may
Commands
be selected at any given time.
At
power
on,
the command parser
is set
to
the root
of
the command tree, therefore no subsystem is
selected.
Note
When
a
program message terminator or
a
leading colon
(:)
is
sent
in
a program
message, the
command
parser
is
returned to
the root
of
the command
tree
HP 54501A
Programming
Programming and Documentation Conventions
4-9