String Variables - HP 54501A Programming Reference Manual

String Variables
If
you want to
observe the headers for
queries, you must
bring
the
returned data into
a
string variable. Reading queries into string
variables
is
simple and straightforward, requiring
little attention to formatting.
For
example:
ENTER
<
device address
>
;Result$
places the output of the query in the string variable ResultS.
Note
String
variables are
case
sensitive and must
be
expressed exactly
the
same each time they are
used.
The output of
the instrument may be numeric or character data
depending on what
is
queried.
Refer to
the specific commands for the
formats and types
of data returned from queries.
Note
For
the example programs, assume that the device being
programmed
is
at
device
address 707. The actual address will
vary according to
how you have
configured
the bus
for your own
application.
The
following example
shows the
data being returned
to
a
string variable
with
headers
off:
10
DIM Rang$[30]
20
OUTPUT 707;":SYSTEM:HEADER OFF"
30
OUTPUT 707;":CHANNEL1:RANGE?"
40 ENTER
707;Rang$
50 PRINT RangS
60
END
After running
this
program, the controller displays:
+1.00000E-1
Introduction to Programming an Oscilloscope
HP 54501A
1-16
Programming