Sequential And Overlapped Commands; Response; Notation Conventions And Definitions; Generation - HP 54501A Programming Reference Manual

Sequential and
Overlapped
Commands.
IEEE
488.2 makes the distinction between sequential and
overlapped
commands. Sequential commands finish their task
before the execution of
the next command
starts.
Overlapped commands run concurrently, and
therefore the command following an overlapped command may
be started
before the overlapped command is completed.
All
the commands
of
the
HP 54501A
are sequential.
Response
Generation
IEEE
488.2 defines two times at which
query
responses
may be buffered.
The
first
is
when
the
query
is parsed
by
the instrument, the
second
is
when
the controller
addresses
the instrument to talk
so that it
may read
the
response.
The HP 54501A will
buffer
responses to
a
query when the query
is parsed.
Notation
Conventions
and Definitions
The following
conventions
are used
in this manual in descriptions of
remote
(HP-IB)
operation:
< >
Angular
brackets enclose
words or
characters that are used to
symbolize
a
program code parameter or an
HP-IB
command.
::
=
"is
defined
as."
For example, <A>::=
<B> indicates that
<
A
>
can be replaced by
<
B
>
in any statement containing
<
A
>.
|
"or."
Indicates
a
choice
of
one element from
a
list.
For
example,
<
A
>
|
<
B
>
indicates
<
A
>
or
<
B
>
but not both.
...
An
ellipsis (trailing dots)
is used to indicate that the
preceding element
may be repeated one or
more times.
[ ] Square brackets indicate that the enclosed items are optional.
{ }
When several items are enclosed
by braces, one, and only one
of
these
elements must be
selected.
HP 54501A
Programming
Programming and Documentation Conventions
4-7