National Instruments SCXI-1127 User Manual
Page 91
Glossary
© National Instruments Corporation
G-5
soft front panel
a graphical program included with NI-SWITCH that you can use to
interactively control the switch
software scanning
a method by which channels are selected through the software
synchronous scanning
hardware-timed scanning uses one triggering signal to advance the
multiplexer to the next channel in the scan
T
TBX
Terminal Block eXtension
terminal block
an accessory containing wire connection points, typically screw terminals
thermistor
a semiconductor sensor that exhibits a repeatable change in electrical
resistance as a function of temperature. Most thermistors exhibit a
negative temperature coefficient.
thermocouple
a temperature sensor created by joining two dissimilar metals. The
junction produces a small voltage as a function of the temperature.
trigger
any event that causes or starts some form of data capture
TTL
Transistor-Transistor Logic
V
V
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 module (VI), which
consists of a front panel user interface and a block diagram program
VMC
voltmeter complete signal—during synchronous or handshake scanning
with an external DMM, this signal advances the switching module to the
next channel. It is called External Trigger In (EXT_TRIG_IN) on the
SCXI-1331 terminal block.