Keysight 82357B User Manual page 19

1 Installing the Keysight 82357B
Introduction to IO interface configuration
An IO interface consists of a hardware interface and a software interface. The
Connection Expert utility is used to associate a unique software interface ID with a
hardware interface.
The Keysight IO Libraries Suite uses an Interface ID or Logical Unit (LU) Number
to identify an interface. This information is passed in the parameter string of the
viOpen function call in a VISA program or in the iopen function call in an SICL
program.
The Connection Expert assigns an Interface ID and Logical Unit (LU) Number to
the interface hardware, as well as other necessary configurations. Typically, the
LU Number is automatically assigned and you can ignore its setting. The LU
Number is used internally as a unique identifier. When the IO interface is
configured, you can use Keysight VISA, VISA COM, or SICL to program assigned
instruments.
Example: IO interface configuration
For example, the GPIB interface system in the
PC, an 82357B USB/GPIB interface, and three GPIB instruments with GPIB
primary addresses of 3, 4, and 5, respectively. The instruments are connected via
GPIB cables.
For this system, the Connection Expert utility has assigned a VISA name of
"GPIB1" and a SICL name of "gpib1". With these names assigned to the
interfaces, the VISA/SICL addressing is as shown in
Since unique names have been assigned by the Connection Expert, you can use
the VISA viOpen command or the SICL iopen command to open the IO paths to
the GPIB instruments as shown in the figure.
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Figure 1-9 consists of a Windows
Figure 1-9.
Keysight 82357B User's Guide