National Instruments NI CompactDAQ 9184 - Page 8

Contents
viii | ni.com
Frequency Measurement...........................................................................................5-11
Low Frequency with One Counter....................................................................5-11
High Frequency with Two Counters................................................................. 5-12
Large Range of Frequencies with Two Counters ............................................. 5-12
Sample Clocked Buffered Frequency Measurement ........................................5-13
Choosing a Method for Measuring Frequency .................................................5-14
Which Method Is Best?..................................................................................... 5-16
Period Measurement ................................................................................................. 5-18
Position Measurement...............................................................................................5-19
Measurements Using Quadrature Encoders...................................................... 5-19
Channel Z Behavior .................................................................................................. 5-20
Measurements Using Two Pulse Encoders.......................................................5-21
Buffered (Sample Clock) Position Measurement .............................................5-21
Two-Signal Edge-Separation Measurement .............................................................5-21
Single Two-Signal Edge-Separation Measurement .......................................... 5-22
Implicit Buffered Two-Signal Edge-Separation Measurement ........................ 5-22
Sample Clocked Buffered Two-Signal Separation Measurement ....................5-23
Counter Output Applications ............................................................................................5-24
Simple Pulse Generation...........................................................................................5-24
Single Pulse Generation.................................................................................... 5-24
Single Pulse Generation with Start Trigger ...................................................... 5-25
Pulse Train Generation ............................................................................................. 5-25
Finite Pulse Train Generation ........................................................................... 5-25
Retriggerable Pulse or Pulse Train Generation................................................. 5-26
Continuous Pulse Train Generation .................................................................. 5-27
Buffered Pulse Train Generation ...................................................................... 5-28
Finite Implicit Buffered Pulse Train Generation ..............................................5-28
Continuous Buffered Implicit Pulse Train Generation ..................................... 5-29
Finite Buffered Sample Clocked Pulse Train Generation ................................ 5-29
Continuous Buffered Sample Clocked Pulse Train Generation ....................... 5-30
Frequency Generation...............................................................................................5-30
Using the Frequency Generator ........................................................................5-30
Frequency Division...................................................................................................5-31
Pulse Generation for ETS .........................................................................................5-32
Counter Timing Signals .................................................................................................... 5-32
Counter n Source Signal ...........................................................................................5-33
Routing a Signal to Counter n Source ..............................................................5-33
Routing Counter n Source to an Output Terminal ............................................5-34
Counter n Gate Signal...............................................................................................5-34
Routing a Signal to Counter n Gate ..................................................................5-34
Routing Counter n Gate to an Output Terminal ...............................................5-34
Counter n Aux Signal ...............................................................................................5-35
Routing a Signal to Counter n Aux...................................................................5-35