User's Manual

Glossary
DAQCard-1200 User Manual G-8 ni.com
T
TIO timing input/output
TTL transistor-transistor logic
two’s complement given a number x expressedinbase2withn digits to the left of the radix
point, the (base 2) number 2n – x
U
unipolar a signal range that is always positive (for example, 0 to +10 V)
V
V volts
VAC volts, alternating current
V
CC
positive supply voltage from the PCMCIA bus (usually +5V)
VDC volts, direct current
VI virtual instrument—(1) a combination of hardware and/or software
elements, typically used with a PC, that has the functionality of a classic
stand-alone instrument (2) a LabVIEW software module (VI), which
consists of a front panel user interface and a block diagram program
V
IH
volts, input high
V
IL
volts, input low
V
in
volts in
V
OH
volts, output high
V
OL
volts, output low
W
WRT Write—the write signal generated from the parallel port interface circuitry