National Instruments Data Acquisition Device NI USB-621x User Manual page 182

Index
pins, default, 8-30
position measurement, 8-15
power, +5 V, 3-3
input, 3-3
output, 3-3
power-up states, 7-6
USB-6212/6216, 6-6
prescaling, 8-34
programmable
function interface, 7-1
power-up states, 7-6
USB-6212/6216, 6-6
programmed I/O, 11-1
changing data transfer methods, 11-2
programming devices in software, 2-5
programming examples (NI resources), C-1
pulse
encoders, 8-17
generation for ETS, 8-24
train generation, 8-22
continuous, 8-22
pulse-width measurement, 8-4
buffered, 8-5
single, 8-4
PWR LED, 3-5
Q
quadrature encoders, 8-15
R
reciprocal frequency measurement, 8-12
referenced single-ended connections
using with floating signal sources, 4-31
when to use with floating signal
sources, 4-25
when to use with ground-referenced
signal sources, 4-33
related documentation, xiv
retriggerable single pulse generation, 8-21
NI USB-621x User Manual
routing, digital, 10-1
RSE configuration, 4-31
RSE connections
using with floating signal sources, 4-31
when to use with floating signal
sources, 4-25
when to use with ground-referenced
signal sources, 4-33
rubber feet, 1-4
S
sample clock, 8-32
edge counting, 8-3
scan speed, 4-8
scanning speed, 4-8
semi-period measurement, 8-8
buffered, 8-8
single, 8-8
sensors, 2-3
settings, analog input ground-reference, 4-3
short high-quality cabling, 4-6
signal
conditioning, 2-3
descriptions, 3-1
labels for USB-621x Screw Terminal, 1-2
sources
floating, 4-25
ground-referenced, 4-31
Signal Stream, USB, 11-1
signals
AI Convert Clock, 4-16
AI Convert Clock Timebase, 4-19
AI Hold Complete Event, 4-19
AI Pause Trigger, 4-22
AI Reference Trigger, 4-21
AI Sample Clock, 4-14
AI Sample Clock Timebase, 4-15
AI Start Trigger, 4-20
analog input, 4-11
analog output, 5-4
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