National Instruments NI USB-621x manual 171

ground-referenced signal sources, 5-9 PFI input signals, 10-3

connections

for floating signal sources, 5-9single-ended for floating signal

sources, 5-9

single-ended, RSE configuration, 5-9connector

information, 3-1USB-6210 pinout, A-1USB-6211 pinout, A-4USB-6215 pinout, A-4USB-6218 pinout, A-7

considerations

for field wiring, 4-11

for multichannel scanning, 4-6 continuous pulse train generation, 9-22 controlling counting direction, 9-2conventions used in the manual, xiii counter input and output, 9-29Counter n A signal, 9-28

Counter n Aux signal, 9-27Counter n B signal, 9-28Counter n Gate signal, 9-27Counter n HW Arm signal, 9-28Counter n Internal Output signal, 9-29Counter n Source signal, 9-26Counter n TC signal, 9-29

Counter n Up_Down signal, 9-28Counter n Z signal, 9-28 counter output applications, 9-20counter signals

Counter n A, 9-28

Counter n Aux, 9-27Counter n B, 9-28Counter n Gate, 9-27Counter n HW Arm, 9-28Counter n Internal Output, 9-29Counter n Source, 9-26Counter n TC, 9-29

Counter n Up_Down, 9-28

Index

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, 2-1DAQ-STC2,2-2data

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

© National Instruments Corporation I-3 NI USB-621x User Manual