National Instruments Isolated Analog Input Device NI PXI-4224 User Manual
Page 75
Glossary
© National Instruments Corporation
G-5
H
h
Hour or hours.
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 DAQ and
control interfaces.
in.
Inch or inches.
INL
Integral nonlinearity—A measure in LSB of the worst-case deviation from
the ideal A/D or D/A transfer characteristic of the analog I/O circuitry.
input bias current
The current that flows into the inputs of a circuit.
input impedance
The resistance and capacitance between the input terminals of a circuit.
input offset current
The difference in the input bias currents of the two inputs of an
instrumentation amplifier.
instrumentation
amplifier
A circuit whose output voltage with respect to ground is proportional to the
difference between the voltages at its two high impedance inputs.
interchannel delay
Amount of time that passes between sampling consecutive channels.
The interchannel delay must be short enough to allow sampling of all
the channels in the channel list, within the scan interval. The greater the
interchannel delay, the more time the PGA is allowed to settle before
the next channel is sampled. The interchannel delay is regulated by
AI CONV CLK.
K
k
Kilo—The standard metric prefix for 1,000, or 10
3
, used with units of
measure such as volts, hertz, and meters.
kS
1,000 samples.