Glossary

Timebase

The reference signals for controlling the basic accuracy of time or

 

frequency-based measurements. For instruments, timebase refers to the

 

accuracy of the internal clock.

tout

Output delay time.

Traditional NI-DAQ

An upgrade to the earlier version of NI-DAQ. Traditional NI-DAQ (Legacy)

(Legacy)

has the same VIs and functions and works the same way as

 

NI-DAQ 6.9.x. You can use both Traditional NI-DAQ (Legacy) and

 

NI-DAQmx on the same computer, which is not possible with NI-DAQ 6.9.x.

transducer

A device that responds to a physical stimulus (heat, light, sound, pressure,

 

motion, flow, and so on), and produces a corresponding electrical signal.

 

See also sensor.

trigger

1. Any event that causes or starts some form of data capture.

 

2. An external stimulus that initiates one or more instrument functions.

 

Trigger stimuli include a front panel button, an external input voltage

 

pulse, or a bus trigger command. The trigger may also be derived from

 

attributes of the actual signal to be acquired, such as the level and slope

 

of the signal.

tsc

Source clock period.

tsp

Source pulse width.

TTL

Transistor-Transistor Logic—A digital circuit composed of bipolar

 

transistors wired in a certain manner. A typical medium-speed digital

 

technology. Nominal TTL logic levels are 0 and 5 V.

U

USB

Universal Serial Bus—A 480 Mbit/s serial bus with up to 12-Mbps

 

bandwidth for connecting computers to keyboards, printers, and other

 

peripheral devices. USB 2.0 retains compatibility with the original USB

 

specification.

V

V

Volts.

Vcm

Common-mode voltage.