Glossary

Extended Self Test

Any self test or diagnostic power-on routine that executes after the initial kernel self test program.

External System Controller

The host computer or other external controller that exerts overall control over VXIbus operations.

IACK Daisy Chain Driver

The circuit that drives the VMEbus Interrupt Acknowledge daisy chain line that runs continuously through all installed modules or through jumpers across the backplane.

ID-ROM

An NVRAM storage area that provides for non-volatile storage of diagnostic data.

Instrument Module

A plug-in printed circuit board, with associated components and shields, that may be installed in a VXIbus mainframe. An instrument module may contain more than one device. Also, one device may require more than one instrument module.

IntelliFrame Mainframe

A family of VXI mainframes from Tektronix that automatically direct airflow to the installed modules, have an autoconfigure backplane, have adjustable rack kits and cable trays (optional), and can be upgraded.

IntelliGuides

The card guides used in the IntelliFrame Mainframe. The card guides on the bottom of the mainframe shut off airflow when no modules are installed in the respective slots.

Interface Device

A VXIbus device that provides one or more interfaces to external equipment.

Interrupt Handler

A functional module that detects interrupt requests generated by Interrupters and responds to those requests by requesting status and identity information.

Interrupter

A device capable of asserting VMEbus interrupts and performing the interrupt acknowledge sequence.

IRQ

The Interrupt ReQuest signal, which is the VMEbus interrupt line that is asserted by an Interrupter to signify to the controller that a device on the bus requires service by the controller.

Glossary±4

VX1410A & VX1420A IntelliFrame Mainframe Instruction Manual