Glossary
NI5911 User Manual G-4 ni.com
F
filtering atype of signal conditioning that allows you to filter unwanted signals from
the signal you aret rying to measure
G
gain the factorby which a signal is amplified, sometimes expressed in decibels
H
hardware thephysical com ponents of a computer system, such as the circuit boards,
plug-in boards, chassis, enclosures, peripherals,cables, and so on
harmonics multiples of the fundamental frequency of a signal
Hz hertz—per second, as in cyclesp er second or samples per second
I
I/O input/output—the transfer of data to/from a computer system involving
communications channels, operatorinterface devices, and/or data
acquisitiona nd controli nterfaces
in. inches
inductance therelationship of induced voltage to current
input bias current the current that flowsin to the inputs of a circuit
input impedance the measured resistance and capacitance between the input terminals of a
circuit
instrument driver a set of high-level software functions that controls a specific plug-in DAQ
board.I nstrument driversare available in several forms, ranging from a
function callable language to a virtual instrument (VI) in LabVIEW.
interrupt acomputer signal indicating that the CPU should suspend its current task
to service adesignated activity