National Instruments NI cDAQ-9172 specifications - page 2

NI cDAQ-9172 User Guide and Specifications 2 ni.com
Analog Input............................................................................................20
Analog Input Triggering...................................................................20
AI Start Trigger Signal..............................................................21
AI Reference Trigger Signal.....................................................22
AI Pause Trigger Signal............................................................24
Analog Input Timing Signals...........................................................24
AI Sample Clock.......................................................................24
AI Sample Clock Timebase.......................................................25
Convert Behavior For Analog Input Modules...........................25
Getting Started with AI Applications in Software...........................28
Analog Output.........................................................................................28
Analog Output Data Generation Methods........................................28
Software-Timed Generations....................................................29
Hardware-Timed Generations...................................................29
Analog Output Triggering................................................................30
Analog Output Timing Signals.........................................................31
AO Sample Clock......................................................................31
AO Start Trigger Signal............................................................31
AO Pause Trigger Signal...........................................................33
Minimizing Glitches on the Output Signal.......................................34
Getting Started with AO Applications in Software..........................34
Digital I/O................................................................................................35
Correlated vs. Static DIO Modules..................................................35
Static DIO.........................................................................................36
Digital Waveform Acquisition (Correlated Input)...........................36
DI Sample Clock Signal............................................................36
Digital Waveform Generation (Correlated Output) .........................37
Buffered Digital Waveform Generation....................................38
Change Detection Event...................................................................39
Routing Change Detection Event to an Output Terminal.........39
Change Detection Acquisition..........................................................39
Digital Input/Output Configuration for NI 9401..............................39
PFI...........................................................................................................40
Counters...................................................................................................40
Counter Input Applications..............................................................42
Counting Edges.........................................................................42
Pulse-Width Measurement........................................................44
Period Measurement..................................................................46
Semi-Period Measurement........................................................48
Frequency Measurement...........................................................49
Position Measurement...............................................................54
Two-Signal Edge-Separation Measurement..............................57
Counter Output Applications............................................................59
Simple Pulse Generation...........................................................59
Pulse Train Generation..............................................................61
Frequency Generation...............................................................62
Frequency Division...................................................................63