National Instruments Isolated Analog Input Device NI PXI-4224 User Manual
Page 79
Glossary
© National Instruments Corporation
G-9
SCXI
Signal Conditioning eXtensions for Instrumentation—The NI product line
for conditioning low-level signals within an external chassis near sensors
so only high-level signals are sent to DAQ devices in the noisy PC
environment.
self-calibrating
A property of a DAQ device that has an extremely stable onboard reference
and calibrates its own A/D and D/A circuits without manual adjustments by
the user.
signal conditioning
The manipulation of signals to prepare them for digitizing.
software trigger
A programmed event that triggers an event such as DAQ.
STC
System timing controller.
T
TRIG
Trigger signal.
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
Volt or volts.
VDC
Volts direct current.
VI
Virtual instrument—(1) A combination of hardware and/or software
elements, typically used with a PC, that has the functionality of a classic
stand-alone instrument; (2) a LabVIEW software device (VI), which
consists of a front panel user interface and a block diagram program.
V
MEAS
Measured voltage.
V
rms
Volts, root mean square.