© National Instruments Corporation G-1 VXI-USB User Manual
Glossary
Symbol Prefix Value
ppico10
–12
nnano10
–9
µmicro 10–6
m milli 10–3
k kilo 103
Mmega10
6
Ggiga10
9
Ttera10
12

Symbols

°degrees
Ωohms

A

A amperes
address Character code that identifies a specific location (or series of locations) in
memory. In VISA, it identifies a resource.
address modifier One of six signals in the VMEbus specification used by VMEbus masters
to indicate the address space in which a data transfer is to take place.
address space A set of 2n memory locations differentiated from other such sets in
VXI/VMEbus systems by six addressing lines known as address modifiers.
n is the number of address lines required to uniquely specify a byte location
in a given space. Valid numbers for n are 16, 24, 32, and 64. In VME/VXI,
because there are six address modifiers, there are 64 possible address
spaces.