HP 54501A Programming Reference Manual page 48

Figure 3-1
shows
a
breakdown of an example
<
program message
>.
There
are a
few key
items to notice:
1. A
semicolon separates commands
from one
another.
Each
< program
message
unit
> serves as a
container for
one command.
The
<
program message
unit
> s
are separated by
a semicolon.
2. A
<
program message
>
is
terminated
by
a <
NL
>
(new line),
a
<
NL
>
with
EOI
asserted, or
EOI being
asserted on the
last
byte of
the
message.
The recognition of
the
<
program message
terminator
>,
or <
PMT
>,
by
the parser
serves as a
signal for
the parser to
begin
execution
of
commands.
The
<
PMT
>
also affects
command tree
traversal (see the Programming and
Documentation
Conventions
chapter).
3.
Multiple data parameters
are separated
by
a
comma.
4.
The
first data parameter
is
separated
from
the header with one or more
spaces.
5.
The header
MEAS:SOURCE
is
a
compound header. It
places the
parser in the measure subsystem until the
<
NL> is
encountered.
Message Communication and System Functions
HP 54501A
3-6
Programming