User manual

Glossary

VXI-MXI-2 User Manual Glossary-6 © National Instruments Corporation

EMC Electromechanical Compliance

EMI Electromagnetic Interference

external controller In this configuration, a plug-in interface board in a computer is

connected to the VXI mainframe via one or more VXIbus

extended controllers. The computer then exerts overall control

over VXIbus system operations.

fair requester A MXIbus master that will not arbitrate for the MXIbus after

releasing it until it detects the bus request signal inactive. This

ensures that all requesting devices will be granted use of the bus.

hard reset Occurs when the mainframe is powered on and when the

VMEbus SYSRESET signal is active. A hard reset restores all

the registers on the VXI-MXI-2 to their initial values.

hex Hexadecimal; the numbering system with base 16, using the

digits 0 to 9 and letters A to F.

Hz hertz; cycles per second.

IACK Interrupt Acknowledge; a special data transfer generated by the

interrupt handler in response to an interrupt.

IC Integrated Circuit

IEEE Institute of Electrical and Electronics Engineers

IEEE-1014 The VME specification.

in. inches

I/O input/output; the techniques, media, and devices used to achieve

communication between machines and users.