National Instruments NI USB-621x - Manual (Page 172)

Index
NI USB-621x User Manual I-4 ni.com
Declaration of Conformity (NI resources), C-1
default
counter terminals, 9-29
NI-DAQmx counter/timer pins, 9-29
pins, 9-29
device
information, A-1
pinouts, 1-3
specifications, 1-3, A-1
USB-6210, A-1
USB-6211, A-4
USB-6215, A-4
USB-6218, A-7
diagnostic tools (NI resources), C-1
DIFF connections
using with floating signal sources, 5-5
using with ground-referenced signal
sources, 5-12
when to use with floating signal
sources, 5-3
when to use with ground-referenced
signal sources, 5-10
differential analog input, troubleshooting, B-1
differential connections
using with floating signal sources, 5-5
using with ground-referenced signal
sources, 5-12
when to use with floating signal
sources, 5-3
when to use with ground-referenced
signal sources, 5-10
digital
isolation, 11-2
isolators, 11-1
digital I/O, 8-1
block diagram, 8-1
circuitry, 8-1
connecting signals, 8-3
getting started with applications in
software, 8-4
I/O protection, 8-2
static DIO, 8-2
triggering, 14-1
digital routing, 12-1
digital signals
connecting, 8-3
digital source, triggering, 14-1
documentation
conventions used in manual, xiii
NI resources, C-1
related documentation, xiv
double-buffered acquisition, 4-10
drivers (NI resources), C-1
duplicate count prevention, 9-35
enabling in NI-DAQmx, 9-38
example, 9-36
prevention example, 9-37
E
edge counting, 9-2
buffered, 9-3
non-cumulative buffered, 9-4
on-demand, 9-2
sample clock, 9-3
single point, 9-2
edge-separation measurement
buffered two-signal, 9-19
single two-signal, 9-18
enabling duplicate count prevention in
NI-DAQmx, 9-38
encoders, quadrature, 9-15
encoding
X1, 9-15
X2, 9-16
X4, 9-16
equivalent time sampling, 9-24
examples (NI resources), C-1
exporting timing output signals using PFI
terminals, 10-3