National Instruments NI 6120 User Manual
Page 111
Glossary
G-6
ni.com
GPCTR1_UP_DOWN
general-purpose counter 1 up down signal
grounded signal
sources
signal sources with voltage signals that are referenced to a system ground,
such as the earth or a building ground; also called grounded signal
sources
H
h
hour
Hz
hertz—the number of scans read or updates written per second
I
I/O
input/output—the transfer of data to/from a computer system involving
communications channels, operator interface devices, and/or data
acquisition and control interfaces
impedance
resistance
in.
inch or inches
INL
integral nonlinearity—a measurement in least significant bits of the
worst-case deviation from the ideal A/D or D/A transfer characteristic of
the analog I/O circuitry
I
OH
current, output high
I
OL
current, output low
IRQ
interrupt request
K
kHz
kilohertz