User`s manual

Note Appendix A has the complete list of Agilent E1445A VXIbus system
specifications.
The AFG Logical
Address
The Agilent E1445A AFG logical address is used:
– to place the AFG in the servant area of a commander
(Agilent E1406A Command Module or an embedded controller, for
example);
– with the AFG servant area switch to set the AFG servant area;
– and to address the AFG (see “Addressing the AFG” on page 22 and
“Using an Embedded Controller” on page 23.)
Assigning the AFG
to a Commander
In a VXIbus system, every device must be in the servant area of a
commander (with the exception of the top-level commander).
Note the following when assigning the Agilent E1445A AFG to a
commander:
• A commander’s servant area is defined as:
Servant area = (logical address + 1) through
(logical address + servant area switch setting)
• The Agilent E1445A AFG is a message-based device. If an
embedded controller and an Agilent E1406A Command Module are
part of your VXIbus system, put the AFG in the servant area of the
controller. This enables you to program the AFG at higher speeds
across the VXIbus backplane, rather than over the Agilent Interface
Bus (GPIB*) via the command module.
• If your system uses an external controller and the Agilent E1406A
Command Module, put the AFG in the servant area of the command
module. This enables the module to function as the GPIB interface
to the arbitrary function generator.
The Agilent E1406A Command Module has a factory set logical
address
of 0 and a servant area switch setting of 255. Using the factory settings,
it is not necessary to change the logical address of the AFG (80) to place
it in the servant area of the command module.
The Agilent E1445A AFG logical address switch is shown in Figure 1-2.
Chapter 1 Getting Started 21
* GPIB is the implementation of IEEE Std. 488.1-1978