Glossary
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B
backplane
an assembly, typically a printed circuit board (PCB), with 96-pin
connectors and signal paths that bus the connector pins. PXI systems
have two connectors, called the J1 and J2 connectors.
bus
the group of conductors that interconnect individual circuitry in a
computer. Typically, a bus is the expansion vehicle to which I/O or
other devices are connected. An example of a PC bus is the PCI bus.
C
C
Celsius
CLKIN
CLKIN is a signal connected to the SMB input pin of the same name.
CLKIN can serve as PXI_CLK10_IN or be used as a phase lock
reference for the OCXO.
CLKOUT
CLKOUT is the signal on the SMB output pin of the same name.
Either the OCXO clock or PXI_CLK10 can be routed to CLKOUT.
clock
hardware component that controls timing for reading from or writing
to groups
CompactPCI
a Eurocard configuration of the PCI bus for industrial applications
D
D/A
digital-to-analog
DAC
digital-to-analog converter—an electronic device that converts a
digital number into a corresponding analog voltage or current
DAQ
data acquisition—(1) collecting and measuring electrical signals from
sensors, transducers, and test probes or fixtures and inputting them to
a computer for processing; (2) collecting and measuring the same
kinds of electrical signals with A/D and/or DIO devices plugged into
a computer, and possibly generating control signals with D/A and/or
DIO devices in the same computer
