HP 54501A - Syntax Syntax; Diagrams

Syntax
Diagrams
The
syntax
diagrams
in
this
chapter
are
similar
to
the
syntax
diagrams
in
the
IEEE
488.2
specification.
Commands
and
queries
are
sent to
the
instrument
as
a
sequence
of
data
bytes. The
allowable
byte
sequence
for
each
functional
element
is
defined
by
the
syntax
diagram
that
is
shown
with the
element
description.
The allowable
byte
sequence
can
be
determined
by
following
a
path
in
the
syntax
diagram.
The
proper
path
through
the
syntax
diagram
is
any
path
that follows
the
direction of
the
arrows.
If
there
is
a path
around an
element,
that
element
is
optional.
If
there
is
a path
from
right
to
left
around
one or
more
elements,
that
element
or
those
elements
may
be
repeated
as
many
times as
desired.
Syntax
Overview
This
overview
is
intended
to
give
a quick
glance
at
the
syntax
defined by
IEEE
488.2.
It should
allow
you
to understand
many
of
the
things
about
the
syntax
you
need to
know.
This chapter
also
contains
the
details
of
the
IEEE
488.2
defined
syntax.
IEEE
488.2
defines
the
blocks
used
to
build
messages
which
are
sent
to
the
instrument.
A
whole
string
of
commands can
therefore
be
broken
up
into
individual
components.
HP
54501A
Programming
Message
Communication
and System
Functions
3-5