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Software Installation and Configuration 2
L4400 User’s Guide 33
GPIB Configuration
The L4400 series instruments are available with an optional GPIB interface.
The steps required to configure L4400 instruments for use over GPIB include:
• connecting the GPIB cables
• adding the instrument to the GPIB interface configuration (using Agilent
Connection Expert)
• changing the instrument GPIB address (systems with multiple L4400
instruments)
• testing the IO path
Each L4400 series instrument is shipped from the factory with a default GPIB
address of 9. Because instruments on the GPIB bus must have unique
addresses, the L4400 instruments must be turned on one at a time, and the
GPIB address changed before the next instrument is turned on and added to
the configuration.
Connecting the GPIB Cables
GPIB cables can be connected in a “star” (all cables connect directly to the
computer) or “linear” (instrument to instrument) configuration.
For systems with multiple L4400 series instruments, turn on only one L4400
instrument at this time. If there is another instrument on the bus at GPIB
address 9 (i.e. 34980A), turn off that instrument until the address of the
current L4400 instrument is changed.
Starting Agilent Connection Expert
Start Agilent Connection Expert by clicking the Agilent Control icon and
selecting “Agilent Connection Expert” from the pop- up menu (Figure 2- 5).
The computer interfaces configured during installation of the Agilent IO
libraries are displayed in the left column (Explorer pane) including the GPIB
interface if a GPIB card is installed in your computer.
NOTE
The following information assumes the GPIB interface card has been
installed in your computer. If necessary, install the card as instructed by
the documentation provided with the card.