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National Instruments PXI-6602 User Manual

National Instruments PXI-6602
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Glossary
NI 660x User Manual G-8 ni.com
start trigger A TTL level signal having two discrete levels, a high and a low level, that
starts an operation.
synchronous A property of an event that is synchronized to a reference clock.
T
TC terminal count—a strobe that occurs when a counter reaches zero from
either direction.
termination Matching of impedances at the end of a signal path to minimize reflections.
timebase Another term used for the SOURCE of a counter. Usually indicates an
internal SOURCE provided by or derived from an onboard oscillator.
trigger Any event that causes, starts, or stops some form of data capture.
tri-state A third output state, other than high or low, in which the output is undriven.
TTL transistor-transistor logic
two-pulse encoder A motion encoder that has two channels: channels A and B. Pulses on
channel A indicate movement in one direction while pulses on channel B
indicate movement in the opposite direction. This type of encoder is also
referred to as up down encoder.
U
unstrobed digital I/O A type of digital input or output in which software reads or writes the
digital line or port states directly, without using any handshaking or
hardware-controlled timing functions. Also called immediate,
nonhandshaking, or unlatched digital I/O.
UP_DOWN The signal that determines whether a counter increments or decrements.
V
V
volts
VDC volts direct current
Vin volts in

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National Instruments PXI-6602 Specifications

General IconGeneral
BrandNational Instruments
ModelPXI-6602
CategoryPCI Card
LanguageEnglish

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