National Instruments NI PXI-562X - Manual (Page 31)

Glossary
NI PXI-562x User Manual G-8 © National Instruments Corporation
Shannon Sampling
Theorem a theorem stating that a signal must be sampled at least twice as fast as the
bandwidth of the signal to accurately reconstruct the signal as a waveform
source impedance a parameter of signal sources that reflects current-driving ability of voltage
sources (lower is better) and the voltage-driving ability of current sources
(higher is better)
system noise a measure of the amount of noise seen by an analog circuit or an ADC when
the analog inputs are grounded
T
temperature
coefficient the percentage that a measurement will vary according to temperature.
See also thermal drift.
thermal drift measurements that change as the temperature varies
thermal EMFs thermal electromotive forces—voltages generated at the junctions of
dissimilar metals that are functions of temperature. Also called
thermoelectric potentials.
thermoelectric
potentials See thermal EMFs.
TIO timing input/output—the engine used for timing and control.
transfer rate the rate, measured in bytes/s, at which data is moved from source to
destination after software initialization and set up operations; the maximum
rate at which the hardware can operate
trigger any event that causes or starts some form of data capture
TTL transistor-transistor logic—a digital circuit composed of bipolar transistors
wired in a certain manner
V
V volts
V
AC
volts alternating current
V
DC
volts direct current