Agilent Technologies 4339B - Page 151

4339B
GPIB
Commands
Case
Letter
cases
(upper
and
lower)
are
ignored.
Program
Message T
erminator
Program
message
must
be
ended
with one
of the
three program
message terminators
,
<new
line> ,
<^END> ,
or <new
line><^END> .
<^END>
means
that
End
Of
Identify
(EOI)
is
asserted
on the
GPIB interface
at the
same time
the
preceding
data
byte
is
sent.
F
or
example
,
the
HP B
ASIC OUTPUT
statement is
automatically sent
after
the
last
data
byte
.
If
you
are
using
a
PC, you
can usually
congure your
system to
send
whatever
terminator
you
specify
.
Common
Command
Syntax
Common
commands
do
not
have
a
hierarchical
structure
.
They
can
be
sent
as
follows:
*CLS
Subsystem
Command
Syntax
Subsystem
commands
consist
of the
mnemonic (keyword)
separated by
colons
.
F
or
example
,
the
command
form
of CONTinuous
under INITiate
subsystem is
constructed as
follows:
:INITiate:CONTinuous
P
arameters
There
must
be
a
<space>
between
the
last
command
mnemonic
and
the
rst
parameter in
a
subsystem
command.
:SYSTem:LFRequency
t
parameter
t
means
a
space
(ASCII
character
(decimal 32))
is inserted
here
.
If
you
send
more
than
one
parameter with
a single
command,
each
parameter
must
be
separated
by
a
comma.
Parameter
Types
SCPI denes
dierent data
formats for
use
in
program
messages
and
query
responses
.
The
4339B accepts
commands and
parameters in
various
formats
and
responds
to
a
particular
query
in a
predened and
xed format.
Each command
reference contains
information
about
the
parameter types
available
for
the
individual
commands
.
< numeric value > Is used in both common commands and subsystem commands
.
<
numeric
value
> represents a numeric parameter as follows:
100 no
decimal point required
100. fractional digits optional
0 1.23 , +235 leading signs allowed
4.56e t 3 space allowed after
e in exponential
0 7.89E 0 01 use either
E or e in exponential
.5 digits left of decimal point optional
The 4339B setting programmed with a numeric parameter can assume
a nite number of values, so the 4339B automatically rounds o
the parameter.For example, the 4339B has a programmable line
frequency of 50 or 60 Hz. If you specied 50.1 , it would be rounded
o to 50 .
GPIB Reference 5-3