Glossary
National Instruments Corporation
G-13
VXI-MIO Series User Manual
rms
root mean square
RSE
referenced single-ended mode—All measurements are made with
respect to a common reference measurement system or a ground.
Also called a grounded measurement system.
RTD
resistive temperature detector—A metallic probe that measures
temperature based upon its coefficient of resistivity.
RTSI Bus
Real-Time System Integration Bus—The National Instruments
timing bus that connects DAQ boards directly for precise
synchronization of functions. For the VXI-MIO Series modules,
the RTSI bus trigger lines are implemented using VXIbus trigger
lines.
S
s
seconds
S
sample
scan
One or more analog or digital input samples. Typically, the
number of input samples in a scan is equal to the number of
channels in the input group. For example, one pulse from the scan
clock produces one scan which acquires one new sample from
every analog input channel in the group.
scan clock
The clock controlling the time interval between scans. On boards
with interval scanning support, this clock gates the channel clock
on and off. On boards with simultaneous sampling, this clock
clocks the track-and-hold circuitry.
SCANCLK
scan clock signal
scan rate
The number of scans per second.
scan width
The number of channels in the channel list or number of ports in
the port list you use to configure an analog or digital input group.
SCXI
Signal Conditioning eXtensions for Instrumentation—The
National Instruments product line for conditioning low-level
signals within an external chassis near sensors so only high-level
signals are sent to DAQ boards in the noisy PC environment.
SE
single-ended inputs—A term used to describe an analog input that
is measured with respect to a common ground.
settling time
The amount of time required for a voltage to reach its final value
within specified limits.
