NI cDAQ-9181/9184/9188/9191 User Manual
© National Instruments | ix
Counter n A, Counter n B, and Counter n Z Signals ................................................ 5-35
Routing Signals to A, B, and Z Counter Inputs................................................ 5-35
Routing Counter n Z Signal to an Output Terminal ......................................... 5-35
Counter n Up_Down Signal ..................................................................................... 5-35
Counter n HW Arm Signal ....................................................................................... 5-35
Routing Signals to Counter n HW Arm Input .................................................. 5-36
Counter n Sample Clock Signal................................................................................ 5-36
Using an Internal Source .................................................................................. 5-36
Using an External Source ................................................................................. 5-37
Routing Counter n Sample Clock to an Output Terminal ................................ 5-37
Counter n Internal Output and Counter n TC Signals .............................................. 5-37
Routing Counter n Internal Output to an Output Terminal .............................. 5-37
Frequency Output Signal .......................................................................................... 5-37
Routing Frequency Output to a Terminal......................................................... 5-37
Default Counter/Timer Routing........................................................................................ 5-37
Counter Triggering ........................................................................................................... 5-38
Other Counter Features..................................................................................................... 5-38
Cascading Counters .................................................................................................. 5-38
Prescaling.................................................................................................................. 5-39
Synchronization Modes ............................................................................................ 5-39
80 MHz Source Mode....................................................................................... 5-39
External or Internal Source Less than 20 MHz ................................................ 5-40
Chapter 6
Digital Routing and Clock Generation
Digital Routing .................................................................................................................6-1
Clock Routing...................................................................................................................6-1
80 MHz Timebase .................................................................................................... 6-2
20 MHz Timebase .................................................................................................... 6-2
100 kHz Timebase .................................................................................................... 6-2
Appendix A
cDAQ-9191 Regulatory Information
Appendix B
Where to Go from Here
Appendix C
NI Services
Index
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