Change Detection Event ........................................................................................... 4-7
Digital Output ........................................................................................................... 4-8
PFI .................................................................................................................................... 4-13
PFI Filters ................................................................................................................. 4-13
Chapter 5
Counter Timing Engine .................................................................................................... 5-1
Counting Edges......................................................................................................... 5-3
Pulse-Width Measurement ....................................................................................... 5-5
Pulse Measurement................................................................................................... 5-7
Semi-Period Measurement ....................................................................................... 5-8
Frequency Measurement........................................................................................... 5-10
Which Method Is Best? .................................................................................... 5-15
Period Measurement ................................................................................................. 5-18
Position Measurement .............................................................................................. 5-18
Channel Z Behavior.................................................................................................. 5-19
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
NI cDAQ-9171/9174/9178 User Manual
© National Instruments | vii