Index
© National Instruments Corporation I-3 NI USB-621x User Manual
ground-referenced signal sources, 5-9
PFI input signals, 10-3
connections
for floating signal sources, 5-9
single-ended for floating signal
sources, 5-9
single-ended, RSE configuration, 5-9
connector
information, 3-1
USB-6210 pinout, A-1
USB-6211 pinout, A-4
USB-6215 pinout, A-4
USB-6218 pinout, A-7
considerations
for field wiring, 4-11
for multichannel scanning, 4-6
continuous pulse train generation, 9-22
controlling counting direction, 9-2
conventions used in the manual, xiii
counter input and output, 9-29
Counter n A signal, 9-28
Counter n Aux signal, 9-27
Counter n B signal, 9-28
Counter n Gate signal, 9-27
Counter n HW Arm signal, 9-28
Counter n Internal Output signal, 9-29
Counter n Source signal, 9-26
Counter n TC signal, 9-29
Counter n Up_Down signal, 9-28
Counter n Z signal, 9-28
counter output applications, 9-20
counter signals
Counter n A, 9-28
Counter n Aux, 9-27
Counter n B, 9-28
Counter n Gate, 9-27
Counter n HW Arm, 9-28
Counter n Internal Output, 9-29
Counter n Source, 9-26
Counter n TC, 9-29
Counter n Up_Down, 9-28
FREQ OUT, 9-29
Frequency Output, 9-29
counter terminals, default, 9-29
counters, 9-1
cascading, 9-33
connecting terminals, 9-29
duplicate count prevention, 9-35
edge counting, 9-2
filters, 9-33
generation, 9-20
input applications, 9-2
other features, 9-32
output applications, 9-20
prescaling, 9-34
pulse train generation, 9-22
retriggerable single pulse
generation, 9-21
simple pulse generation, 9-20
single pulse generation, 9-20
single pulse generation with
start trigger, 9-20
timing signals, 9-25
triggering, 9-31
counting edges, 9-2
creating an AC return path, 11-3
crosstalk when sampling multiple
channels, B-1
D
DACs, 7-1
DAQ hardware, 2-1
DAQ system, 2-1
DAQ-STC2, 2-2
data
acquisition methods, 4-9
generation methods, 7-2
transfer methods, 13-1
changing, 13-2
programmed I/O, 13-2
USB signal stream, 13-1
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