National Instruments VXI-USB - Manual (Page 49)

© National Instruments Corporation G-1 VXI-USB User Manual
Glossary
Symbol Prefix Value
p pico 10 –12
n nano 10 –9
µ
micro 10 – 6
m milli 10 –3
k kilo 10 3
M mega 10 6
G giga 10 9
T tera 10 12
Symbols
°
degrees
Ω
ohms
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 2 n 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.