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Agilent 4155B/4156B VXIplug&play Driver User’s Guide, Edition 4
Driver Functions
hp4156b_cmdReal
hp4156b_cmdReal
This function passes the cmd_str string to the instrument. This entry point passes
the string in cmd_str followed by a space and then the real in value. Note that either
an Real32 or 64 can be passed as the Real32 will be promoted.
Syntax
ViStatus _VI_FUNC hp4156b_cmdReal(ViSession vi, ViString cmd_str,
ViReal64 value);
Parameters
vi
Instrument handle returned from hp4156b_init( ).
cmd_str
Instrument command (cannot exceed 256 bytes in length).
value
Parameter for command. -1E+300 to 1E+300.
hp4156b_cmdReal64Arr_Q
This function passes the cmd_str string to the instrument. This command expects a
response that is a definite arbitrary block of 64 bit reals. You specify the cmd_str
and size parameters, and get result[ ] and count.
Syntax
ViStatus _VI_FUNC hp4156b_cmdReal64Arr_Q(ViSession vi, ViString cmd_str,
ViInt32 size, ViReal64 _VI_FAR result[ ], ViPInt32 count);
Parameters
vi
Instrument handle returned from hp4156b_init( ).
cmd_str
Instrument command (cannot exceed 256 bytes in length).
size
Size of result[ ] (number of items in the array).
1 to 2147483647.
result[ ]
Response from instrument.
count
Count of valid items in result[ ].
