Specifications

40 System Instrument Configuration Chapter 2
Agilent E8491B PC
Link to VXI
Interconnect
The E8491B interconnect links the IEEE 1394 bus to the backplane of the
VXI mainframe. The E8491B is a C-size device with VXI Resource
Manager and Slot 0 capability.
There are no configuration switches on the E8491B. The device’s logical
address is 0 and it provides the system’s resource manager functionality via
software that is part of the Agilent I/O Libraries. Its VXI servant area is 255,
therefore; it is the interface to all VXI devices with logical addresses
between 1 and 255. The E8491B is normally, but not required to be, installed
in mainframe slot 0.
Installing the E8491B
into the VXI Mainframe
The following installation steps are referenced to Figure 2-6.
1. If power is applied to the VXI mainframe, remove power to the VXI
mainframe and disconnect all power sources that may be applied to any
instruments.
2. Insert the E8491B into mainframe slot 0 by aligning the module with the
guides inside the mainframe (Figure 2-6). Slowly push the module into the
slot until it seats in the backplane connectors. It may be necessary to pull out
(not remove) the retaining screws in order to seat the device securely in the
connectors.
3. Tighten the retaining screws on the top and bottom of the module.
4. Connect the interface cable from the host adapter to E8491B port A, B, or
C. The ports are identical and unused ports are available to connect
additional E8491Bs and other IEEE 1394 devices in a daisy-chain or tree
configuration. Refer to the E8491B User Manual for more information.
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