Program Message Syntax - HP 54501A Programming Reference Manual

Program Message
Syntax
For
example,
if
the instrument address for the HP 54501A
is 4
and the
interface select code
is 7,
when
the
program message
is
passed, the
routine performs
its
function on the instrument at device address 704.
For
the
HP
54501A, the
instrument address
is
typically
set
to
"7"
at the
factory.
This address can be changed in the
HP-IB
menu
of the
Utility
menu.
Note
The program examples in this
manual
assume the
HP 54501A
is
at device address 707.
To program the instrument over the bus, you must
have an understanding
of the command format and structure expected
by
the instrument. The
instrument
is remotely programmed with program
messages.
These are
composed
of
sequences
of program message units,
with each unit
representing
a
program command or query.
A
program command or
query
is composed
of
a sequence
of functional elements that include
separators, headers, program data,
and terminators. These are
sent
to the
instrument over the system
interface
as a
sequence
of
ASCII
data
messages.
For example:
PROGRAM MESSAGE UNIT
DATA
OUTPUT XXX;":SYSTEM:HEADER
ON"
T COMMAND ——————————————————
E ADDRESS
—————————————————————————
ONAL)
—————————————————————————————————
AM
MNEMONICS
——————————————————————————————
ATOR
—————————————————————————————————————————————————
Introduction to Programming an Oscilloscope
1-4
HP 54501A
Programming