National Instruments NI USB-621x - Manual (Page 174)

Index
NI USB-621x User Manual I-6 ni.com
instrumentation amplifier, 4-2
interface, bus, 13-1
isolated DAQ devices, 11-1
benefits, 11-2
common-mode noise, 11-2
isolators, 11-1
K
KnowledgeBase, C-1
L
LabVIEW documentation, xiv
LabWindows/CVI documentation, xv
LED
USB-6210, A-3
USB-6211, A-6
USB-6215, A-6
USB-6218, A-9
low impedance sources, 4-6
M
M Series
information, A-1
specifications, xvi, A-1
Measurement Studio documentation, xv
measurements
buffered period, 9-7
buffered pulse-width, 9-5
buffered semi-period, 9-9
buffered two-signal edge-separation, 9-19
choosing frequency, 9-13
frequency, 9-10
period, 9-6
position, 9-15
pulse-width, 9-5
semi-period, 9-9
single period, 9-7
single pulse-width, 9-5
single semi-period, 9-9
single two-signal edge-separation, 9-18
two-signal edge-separation, 9-18
using quadrature encoders, 9-15
using two pulse encoders, 9-17
measuring
high frequency with two counters, 9-11
large range of frequencies using two
counters, 9-12
low frequency with one counter, 9-10
averaged, 9-11
methods, data transfer, 13-1
minimizing
glitches on the output signal, 7-2
output signal glitches, B-3
voltage step between adjacent
channels, 4-8
multichannel scanning considerations, 4-6
MUX, 4-1
N
National Instruments support and
services, C-1
NI support and services, C-1
NI-DAQ documentation, xiv
device documentation browser, xvi
NI-DAQmx
default counter terminals, 9-29
enabling duplicate count prevention, 9-38
NI-PGIA, 4-2
non-buffered
hardware-timed acquisitions, 4-10
non-cumulative buffered edge counting, 9-4
non-referenced single-ended connections
using with floating signal sources, 5-8
using with ground-referenced signal
sources, 5-13
when to use with floating signal
sources, 5-4