National Instruments USB-621 Series User Manual

Index
© National Instruments Corporation I-9 NI USB-621x User Manual
R
reciprocal frequency measurement, 8-13
referenced single-ended configuration, 4-31
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, 8-22
routing, digital, 10-1
RSE connections
when to use with ground-referenced
signal sources, 4-33
rubber feet, 1-6
S
sample clock, 8-34
edge counting, 8-3
measurement, 8-18
scan speed, 4-8
scanning speed, 4-8
self-calibration, 1-2
semi-period measurement, 8-8
buffered, 8-9
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, 1-3
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, 5-5
AO Pause Trigger, 5-6
AO Sample Clock, 5-8
AO Sample Clock Timebase, 5-9
AO Start Trigger, 5-5
connecting analog input
on USB-6210/6211/6212
devices, 4-23
on USB-6215/6216/6218
devices, 4-36
connecting analog output, 5-4
connecting digital I/O
on USB-6210/6211/6215/6218, 6-3
on USB-6212/6216, 6-6
connecting PFI input, 7-4
Counter n A, 8-30
Counter n Aux, 8-29
Counter n B, 8-30
Counter n Gate, 8-29
Co
unter n HW
Arm, 8-30
Counter n Int
ernal Output, 8-31
Counter n Source, 8-28
Counter n TC, 8-31
Counter n Up_Down, 8-30
Counter n Z, 8-30
counters, 8-27
exporting timing output using PFI
terminals, 7-3
FREQ OUT, 8-31
Frequency Output, 8-31

National Instruments USB-621 Series Specifications

General

Brand	National Instruments
Model	USB-621 Series
Category	Measuring Instruments
Language	English