Sony Tektronix VX4792 User Manual page 284

VX4792 User Manual
Logical Address
An 8-bit number that uniquely identifies each VXIbus device in a system.
The logical address defines a device's A16 register address, and indicates
Commander/Servant relationships.
Mainframe
A rigid framework that provides mechanical support for modules inserted
into a VXIbus backplane. The mainframe ensures that connectors mate
properly, that adjacent modules do not contact each other, and that modules
do not disengage from the backplane due to vibration or shock. The
mainframe may also provide mechanical support and housing for power
supplies and their distribution wiring to the backplane.
Marker
Front panel output signals that are synchronized to the output waveform.
Memory Device
A storage device (such as bubble memory, RAM, or 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 element,
with a well-defined message body and terminator.
Message Based Device
A VXIbus device that supports VXI configuration and communication
registers. Such devices support the word serial protocol, and and may
support shared memory protocols.
Module
Typically consists of a board assembly and its associated mechanical parts;
the VX4792 Arbitrary Waveform Generator is a module. A module may
occupy one or more slots.
P1
The top-most backplane connector for a given module slot in a vertical
VXIbus mainframe such as the Tektronix VX1410. The left-most backplane
connector for a given slot in a horizontal mainframe, such as the Tektronix
VX1405.
P2
The middle backplane connector for a given module slot in a VXIbus
mainframe.
P3
The bottom backplane connector for a given module slot in a vertical
VXIbus mainframe such as the Tektronix VX1410. The right-most backplane
connector for a given slot in a horizontal mainframe, such as the Tektronix
VX1405.
Glossary
Glossary-3