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base address
BIOS
bipolar
breakdown voltage
burst-mode
bus
bus master
C
C
CalDAC
CH
channel clock
CMRR
cold-junction
compensation
© National Instruments Corporation
a memory address that serves as the starting address for programmable
registers. All other addresses are located by adding to the base address.
basic input/output system—BIOS functions are the fundamental level of
any PC or compatible computer. BIOS functions embody the basic
operations needed for successful use of the computer's hardware resources.
a signal range that includes both positive and negative values (for example,
–5 V to +5 V)
the voltage high enough to cause breakdown of optical isolation,
semiconductors, or dielectric materials. See also working voltage.
a high-speed data transfer in which the address of the data is sent followed
by back-to-back data words while a physical signal is asserted
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. Examples of PC buses are the ISA and PCI bus.
a type of a plug-in board or controller with the ability to read and write
devices on the computer bus
Celsius
calibration DAC
channel—pin or wire lead to which you apply or from which you read the
analog or digital signal. Analog signals can be single-ended or differential.
For digital signals, you group channels to form ports. Ports usually consist
of either four or eight digital channels.
the clock controlling the time interval between individual channel sampling
within a scan. Boards with simultaneous sampling do not have this clock.
common-mode rejection ratio—a measure of an instrument's ability to
reject interference from a common-mode signal, usually expressed in
decibels (dB)
a method of compensating for inaccuracies in thermocouple circuits
G-3
PCI-6023E/6024E/6025E User Manual
Glossary
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