Table of Contents
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Index
digital
input and output, 6-1
isolation, 9-3
isolators, 9-1
routing, 10-1
signals, connecting, 6-2, 8-6
source, triggering, 12-1
digital I/O
circuitry, 6-1
connecting signals, 6-2, 8-6
getting started with applications in
software, 6-4
I/O protection, 6-1, 8-5
programmable power-up states, 6-1, 8-6
triggering, 12-1
digital isolators, 4-2, 5-2
DMA
as a transfer method, 11-3
changing data transfer methods, 11-4
controllers, 11-1
documentation
conventions used in manual, xiii
NI resources, C-1
related documentation, xiv
double-buffered acquisition, 4-11
drivers (NI resources), C-1
duplicate count prevention, 7-35
enabling in NI-DAQmx, 7-38
example, 7-37
troubleshooting, B-3
E
edge counting, 7-3
buffered, 7-4
non-cumulative buffered, 7-5
sample clock, 7-4
edge-separation measurement
buffered two-signal, 7-20
single two-signal, 7-19
NI 6238/6239 User Manual
enabling duplicate count prevention in
NI-DAQmx, 7-38
encoders, quadrature, 7-16
encoding
X1, 7-16
X2, 7-17
X4, 7-17
equivalent time sampling, 7-25
examples (NI resources), C-1
exporting timing output signals using PFI
terminals, 8-3
external
reference clock, 10-2
source mode, 7-40
F
features, counter, 7-33
field wiring considerations, 4-11
filters
counter, 7-33
PFI, 8-4
PXI_STAR, 10-8
RTSI, 10-6
FREQ OUT signal, 7-30
frequency
division, 7-25
generation, 7-24
generator, 7-24
measurement, 7-10
Frequency Output signal, 7-30
G
generations
analog output data, 5-2
buffered hardware-timed, 5-3
clock, 10-1
continuous pulse train, 7-23
frequency, 7-24
hardware-timed, 5-2
I-4
ni.com
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