National Instruments DAQ 6527 User Manual
Page 43
Glossary
G-4
www.ni.com
O
optocoupler
a device that transfers electrical signals by utilizing light waves to provide
coupling with electrical isolation between input and output
optical isolation
the technique of using an optocoupler to transfer data without electrical
continuity, to eliminate high-potential differences and transients
P
PCI
Peripheral Component Interconnect—a high-performance expansion bus
architecture originally developed by Intel to replace ISA and EISA.
port
a digital port, consisting of four or eight lines of digital input and/or output
PXI
PCI eXtensions for Instrumentation—an open specification that builds on
the CompactPCI specification by adding instrumentation-specific features
R
rms
root mean square
S
S
samples
s
seconds
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
signal conditioning
the manipulation of signals to prepare them for digitizing