VX4792 User Manual
Glossary-1
Glossary
ACFAIL~
A VXIBus backplane line that is asserted under the following conditions: by
the VXIbus mainframe power supply when a power failure has occurred
(either AC line source or power supply malfunction), or by the front panel
ON/STANDBY switch when it is set to STANDBY.
AM
The amplitude modulation or waveform multiplication feature.
Arbitrary Waveform Generator (ARB)
Essentially a digital-to-analog converter with built-in memory, plus trigger
and output mode settings.
A-Size Card
A VXIbus instrument module that is 100 mm X 160 mm X 20.32 mm
(3.9 in X 6.3 in X 0.8 in) for a single-wide unit.
ASCII
Acronym for the American Standard Code for Information Interchange.
Controllers transmit commands to the instrument using ASCII character
encoding.
Autostep
Generates the predefined waveform in an autostep file; the next trigger
advances the waveform.
Backplane
The printed circuit board that is mounted within a VXIbus mainframe to
provide the interface between the VXIbus modules, and between the
mainframe power supply and VXI modules.
BNF (Backus-Naur Form)
A standard notation system for command syntax diagrams. The syntax
diagrams in this manual use BNF notation.
B-Size Card
A VXIbus instrument module that is 233.4 mm X 160 mm X 20.32 mm
(9.2 in X 6.3 in X 0.8 in) for a single-wide unit.
Command
Any communication from a commander to a message-based servant.
Commander
A device that controls one or more devices (servants). A commander may be
a servant of another commander, and is a message-based device which is also
a bus master.
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