National Instruments Data Acquisition Device NI USB-621x - Manual (Page 180)

Index
NI USB-621x User Manual I-6 ni.com
ground-referenced signal sources
connecting, 4-31
description, 4-31
using in differential mode, 4-33
using in NRSE mode, 4-34
when to use in differential mode, 4-32
when to use in NRSE mode, 4-32
when to use in RSE mode, 4-33
H
hardware, 1-1, 2-1
hardware-timed
acquisitions, 4-9
generations, 5-2
help, technical support, C-1
I
I/O connector, 3-1
USB-6210 pinout, A-2
USB-6211 pinout, A-4
USB-6212 pinout, A-6, A-8
USB-6215 pinout, A-4
USB-6216 pinout, A-6, A-8
USB-6218 pinout, A-13
I/O protection, 6-2, 6-5, 7-6
input signals, using PFI terminals as, 7-2
insertion of grounded channels between signal
channels, 4-7
installation
hardware, 1-1
NI-DAQ, 1-1
other software, 1-1
instrument drivers (NI resources), C-1
instrumentation amplifier, 4-1
interface, bus, 11-1
isolated DAQ devices, 9-1
benefits, 9-2
common-mode noise, 9-3
isolation barrier, 4-2, 5-2
isolators, 9-1
K
KnowledgeBase, C-1
L
LabVIEW documentation, xv
LabVIEW PDA 8.x, xiv
LabWindows/CVI documentation, xvi
LED, 3-5
Linux, xiv
low impedance sources, 4-6
M
Mac OS X, xiv
Measurement Studio documentation, xvi
measurements
buffered period, 8-7
buffered pulse-width, 8-5
buffered semi-period, 8-8
buffered two-signal edge-separation, 8-19
choosing frequency, 8-13
frequency, 8-9
period, 8-6
position, 8-15
pulse-width, 8-4
semi-period, 8-8
single period, 8-6
single pulse-width, 8-4
single semi-period, 8-8
single two-signal edge-separation, 8-18
two-signal edge-separation, 8-18
using quadrature encoders, 8-15
using two pulse encoders, 8-17
measuring
high frequency with two counters, 8-11
large range of frequencies using two
counters, 8-12
low frequency with one counter, 8-9
averaged, 8-10