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Glossary
Getting Started with Your PCI/PXI-6810 SDA
G-16
© National Instruments Corporation
switchless device
devices that do not require DIP switches or jumpers to configure
resources on the devices—also called Plug and Play devices
synchronous
(1) hardware—a property of an event that is synchronized to a reference
clock (2) software—a property of a function that begins an operation
and returns only when the operation is complete
system RAM
RAM installed on a personal computer and used by the operating
system, as contrasted with onboard RAM
system noise
a measure of the amount of noise seen by an analog circuit or an ADC
when the analog inputs are grounded
T
TC
terminal count—the highest value of a counter
TD
Transmit Data signal
throughput rate
the data, measured in bytes/s, for a given continuous operation,
calculated to include software overhead. Throughput Rate = Transfer
RateSoftware Overhead Factor.
top-level VI
VI at the top of the VI hierarchy. This term is used to distinguish the VI
from its subVIs.
transducer
See sensor
transducer excitation
a type of signal conditioning that uses external voltages and currents to
excite the circuitry of a signal conditioning system into measuring
physical phenomena
transfer rate
the rate, measured in bytes/s, at which data is moved from source to
destination after software initialization and set up operations; the
maximum rate at which the hardware can operate
trigger
any event that causes or starts some form of data capture
TTL
transistor-transistor logic