National Instruments USB-621 Series User Manual page 195

Index
AI Reference Trigger, 4-21
AI Sample Clock, 4-14
AI Sample Clock Timebase, 4-15
AI Start Trigger, 4-20
analog output, 5-1
circuitry, 5-1
connecting signals, 5-4
data generation methods, 5-2
fundamentals, 5-1
getting started with applications in
software, 5-10
glitches on the output signal, 5-2
range, 5-2
signals, 5-5
timing signals, 5-5
trigger signals, 5-4
triggering, 5-4
troubleshooting, B-3
analog output signals, 5-5
AO Pause Trigger, 5-6
AO Sample Clock, 5-8
AO Sample Clock Timebase, 5-9
AO Start Trigger, 5-5
analog-to-digital converter, 4-2
ANSI C documentation, xvii
AO FIFO, 5-1
AO Pause Trigger signal, 5-6
AO Sample Clock, 5-2
AO Sample Clock signal, 5-8
AO Sample Clock Timebase signal, 5-9
AO Start Trigger signal, 5-5
ao/PauseTrigger, 5-6
ao/SampleClock, 5-8
ao/StartTrigger, 5-5
applications
counter input, 8-2
counter output, 8-21
edge counting, 8-2
applying rubber feet, 1-6
arm start trigger, 8-33
NI USB-621x User Manual
B
BNC
cables, 2-4
connecting signals, A-15, A-23
board mounting, 1-7
buffered
edge counting, 8-3
hardware-timed acquisitions, 4-9
hardware-timed generations, 5-3
period measurement, 8-7
position measurement, 8-18
pulse-width measurement, 8-5
semi-period measurement, 8-9
two-signal edge-separation
measurement, 8-20
bus interface, 11-1
C
cable management, 1-5
cables, 2-4
custom, 2-4
USB-6212 Mass Termination, A-10
USB-6216 Mass Termination, A-10
calibration, 1-2, 2-2
certificate (NI resources), C-2
circuitry, 2-2
cascading counters, 8-35
changing data transfer methods
between USB Signal Stream and
programmed I/O, 11-2
channel scanning order, 4-6
channel Z behavior, 8-17
channels, sampling with AI Sample Clock and
AI Convert Clock, B-2
charge injection, B-1
chassis ground, 3-4
choosing frequency measurement, 8-14
circular-buffered acquisition, 4-9
I-2 ni.com