Glossary
Getting Started with Your PCI/PXI-6810 SDA
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© National Instruments Corporation
C
C
Celsius
cache
high-speed processor memory that buffers commonly used instructions
or data to increase processing throughput
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.
channel clock
the clock controlling the time interval between individual channel
sampling within a scan. Boards with simultaneous sampling do not have
this clock.
circuit trigger
a condition for starting or stopping clocks
clock
hardware component that controls timing for reading from or writing to
groups
CMOS
complementary metal-oxide semiconductor
conversion device
device that transforms a signal from one form to another. For example,
analog-to-digital converters (ADCs) for analog input, digital-to-analog
converters (DACs) for analog output, digital input or output ports, and
counter/timers are conversion devices.
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
counter/timer
a circuit that counts external pulses or clock pulses (timing)
coupling
the manner in which a signal is connected from one location to another
CPU
central processing unit
crosstalk
an unwanted signal on one channel due to an input on a different
channel
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
