HP 54501A - Page 51

<
program
message
>.
The
<
program
message
> is
a
complete
message
to be
sent
to
the
instrument.
The
instrument
will
begin executing
commands
once
it
has
a
complete
<
program
message
>,
or
when
the
input
buffer
becomes
full.
The
parser
is
also
repositioned
to
the
root
of
the
command
tree
after
executing a complete
<
program
message
>.
Refer
to
the
Tree
Traversal
Rules
in
the
Programming
and
Documentation
Conventions
chapter
for
more
details.
Figure
3-3.
<program
message
>
<
program
message
unit
>.
The
<
program
message
unit
> is
the
container
for
individual
commands
within
a
<
program
message
>.
<commond
messoge
unil>
<query
messoge
unit>
Figure
3-4.
<program
message
unit
>
HP
54501A
Programming
Message Communication
and System Functions
3-9