Glossary
NIPXI-562x User Manual G-8 ©NationalInstruments Corporation
Shannon Sampling
Theorem
atheorem stating that a signal must be sampled at least twice as fast as the
bandwidth oft hesignal to accurately reconstruct the signal as a waveform
sourcei mpedance aparameter 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)
systemnoise ameasure of the amount of noise seen by an analog circuit or an ADC when
the analog inputs are grounded
T
temperature
coefficient
the percentagethat a measurement will vary according to temperature.
See also thermal drift.
thermald rift measurementsthat change as the temperature varies
thermalE MFs thermalelectromotive 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.
transferrate the rate,measured in bytes/s, at which data is moved from source to
destinationafter software initialization and set up operations; the maximum
rateat which the hardware can operate
trigger anyevent that causes or starts some form of data capture
TTL transistor-transistorlogic—ad igital circuit composed of bipolar transistors
wired ina certain manner
V
V volts
VAC voltsalternating cur rent
VDC voltsdirect current