User`s guide

14 82357B User’s Guide
1 Installing the Agilent 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 Agilent 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 Agilent VISA,
VISA COM, or SICL to program assigned instruments.
Example: IO interface configuration
For example, the GPIB interface system in the Figure 1- 9
consists of a Windows 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 Figure 1- 9.
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.