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Counter Timing Signals ................................................................... 63
Counter n Source Signal ........................................................... 64
Counter n Gate Signal............................................................... 65
Counter n Aux Signal ............................................................... 65
Counter n A, Counter n B, and Counter n Z Signals ................ 66
Counter n Up_Down Signal ..................................................... 66
Counter n HW Arm Signal ....................................................... 66
Counter n Internal Output and Counter n TC Signals .............. 67
Frequency Output Signal .......................................................... 67
Default Counter/Timer Routing....................................................... 68
Counter Triggering .......................................................................... 68
Other Counter Features .................................................................... 69
Cascading Counters .................................................................. 69
Counter Filters .......................................................................... 69
Prescaling.................................................................................. 70
Duplicate Count Prevention...................................................... 71
Synchronization Modes ............................................................ 73
Digital Routing and Clock Generation.................................................... 75
Clock Routing .................................................................................. 76
80 MHz Timebase .................................................................... 76
20 MHz Timebase .................................................................... 76
100 kHz Timebase .................................................................... 76
Specifications .......................................................................................... 77
Analog Input .................................................................................... 77
Analog Output.................................................................................. 77
Digital Waveform Characteristics (Slots 1 through 4 Only) ........... 78
PFI Characteristics (Slots 5 and 6 Only) ......................................... 78
General-Purpose Counter/Timers (Slots 5 and 6 Only)................... 79
Frequency Generator (Slots 5 and 6 Only) ...................................... 80
AI Modules) .................................................................................. 80
Module I/O States ............................................................................ 80
Power Requirements ........................................................................ 80
Bus Interface .................................................................................... 81
Physical Characteristics ................................................................... 81
Safety ............................................................................................... 81
Environmental.................................................................................. 82
Shock and Vibration ........................................................................ 82
Electromagnetic Compatibility ........................................................ 83
CE Compliance ................................................................................ 83
Environmental Management............................................................ 83
Where to Go for Support......................................................................... 84
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NI cDAQ-9172 User Guide and Specifications
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