Owner's manual

Glossary
82
voltage/digital value on a capacitor for
a short period of time.
SNR Signal-to-Noise Ratio: The ratio of the
overall rms signal level to the rms noise
level, expressed in dB.
Software Trigger A programmed event that triggers an
event such as data acquisition.
SPDT Single-Pole Double Throw: A property
of a switch in which one terminal can
be connected to one of two other
terminals.
SSH Simultaneous Sampling and Hold: A
property of a system in which each
input or output channel is digitized or
updated at the same instant.
S/s Samples per second; used to express
the rate at which a DAQ board samples
an analog signal.
Strain Gauge A sensor whose resistance is a function
of the applied force.
Subroutine A set of software instructions executed
by a single line of code that may have
input and/or output parameters.
Synchronous A property of a function that begins an
operation and returns only when the
operation is complete.
T
TCP/IP A set of standard protocols for
communicating across a single network
or interconnected set of networks. The
Internet Protocol (IP) for the low-level
service of taking data and packaging of
components, and Transmission Control
Protocol (TCP) for high-reliability data
transmissions.
THD Total Harmonic Distortion: The ratio of
the total rms signal due to harmonic