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Glossary
PCI-6023E/6024E/6025E User Manual G-4
©
National Instruments Corporation
common-mode range the input range over which a circuit can handle a common-mode signal
common-mode signal the mathematical average voltage, relative to the computer’s ground, of the
signals from a differential input
conversion time the time required, in an analog input or output system, from the moment a
channel is interrogated (such as with a read instruction) to the moment that
accurate data is available
CONVERT* convert signal
counter/timer a circuit that counts external pulses or clock pulses (timing)
crosstalk an unwanted signal on one channel due to an input on a different channel
CTR counter
current drive capability the amount of current a digital or analog output channel is capable of
sourcing or sinking while still operating within voltage range specifications
current sinking the ability of a DAQ board to dissipate current for analog or digital output
signals
current sourcing the ability of a DAQ board to supply current for analog or digital output
signals
D
D/A digital-to-analog
DAC digital-to-analog converter—an electronic device, often an integrated
circuit, that converts a digital number into a corresponding analog voltage
or current
DAC0OUT analog channel 0 output signal
DAC1OUT analog channel 1 output signal
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 boards plugged into a computer, and
possibly generating control signals with D/A and/or DIO boards in the
same computer
PCI.book Page 4 Wednesday, September 16, 1998 9:09 AM