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Glossary
VX1410A & VX1420A IntelliFrame Mainframe Instruction Manual
Glossary–5
Local Bus
A daisy-chained bus that connects adjacent VXIbus slots.
Local Controller
The instrument module that performs system control and external interface
functions for the instrument modules in a VXIbus mainframe or several
mainframes. See Resource Manager.
Local Processor
The processor on an instrument module.
Logical Address
The smallest functional unit recognized by a VXIbus system. It is often used
to identify a particular module.
Mainframe
Card Cage. For example, the Tektronix VX1410A Mainframe, an operable
housing that includes 13 C-size VXIbus instrument module slots.
Memory Device
A storage element (such as bubble memory, RAM, and ROM) that has
configuration registers and memory attributes (such as type and access time).
Message
A series of data bytes that are treated as a single communication, with a well
defined terminator and message body.
Message Based Device
A VXIbus device that supports VXI configuration and communication
registers. Such devices support the word serial protocol, and possibly other
message-based protocols.
MODID Lines
Module/system identity lines.
Physical Address
The address assigned to a backplane slot during an access.
Power Monitor
A device that monitors backplane power and reports fault conditions.
P1
The top-most backplane connector for a given module slot in a vertical
mainframe such as the Tektronix VX1410A. The left-most backplane
connector for a given slot in a horizontal mainframe.
P2
The bottom backplane connector for a given module slot in a vertical C-size
mainframe such as the VX1410A; or the middle backplane connector for a
given module slot in a vertical D-size mainframe.