Network Device User's Manual

Contents
NI 6124/6154 User Manual viii ni.com
Period Measurement ....................................................................................... 7-6
Single Period Measurement.............................................................. 7-6
Buffered Period Measurement.......................................................... 7-7
Semi-Period Measurement.............................................................................. 7-7
Single Semi-Period Measurement .................................................... 7-8
Buffered Semi-Period Measurement ................................................ 7-8
Frequency Measurement ................................................................................. 7-9
Choosing a Method for Measuring Frequency ................................. 7-12
Position Measurement..................................................................................... 7-14
Measurements Using Quadrature Encoders...................................... 7-14
Measurements Using Two Pulse Encoders ...................................... 7-16
Buffered (Sample Clock) Position Measurement ............................. 7-17
Two-Signal Edge-Separation Measurement ................................................... 7-17
Single Two-Signal Edge-Separation Measurement.......................... 7-18
Buffered Two-Signal Edge-Separation Measurement...................... 7-18
Counter Output Applications......................................................................................... 7-19
Simple Pulse Generation................................................................................. 7-19
Single Pulse Generation.................................................................... 7-19
Single Pulse Generation with Start Trigger...................................... 7-20
Retriggerable Single Pulse Generation............................................. 7-20
Pulse Train Generation.................................................................................... 7-21
Continuous Pulse Train Generation.................................................. 7-21
Finite Pulse Train Generation........................................................... 7-22
Frequency Generation ..................................................................................... 7-23
Using the Frequency Generator ........................................................ 7-23
Frequency Division ......................................................................................... 7-24
Pulse Generation for ETS ............................................................................... 7-24
Counter Timing Signals................................................................................................. 7-25
Counter n Source Signal ................................................................................. 7-26
Routing a Signal to Counter n Source .............................................. 7-26
Routing Counter n Source to an Output Terminal............................ 7-27
Counter n Gate Signal..................................................................................... 7-27
Routing a Signal to Counter n Gate.................................................. 7-27
Routing Counter n Gate to an Output Terminal ............................... 7-27
Counter n Aux Signal...................................................................................... 7-28
Routing a Signal to Counter n Aux .................................................. 7-28
Counter n A, Counter n B, and Counter n Z Signals ...................................... 7-28
Routing Signals to A, B, and Z Counter Inputs................................ 7-28
Routing Counter n Z Signal to an Output Terminal ......................... 7-28
Counter n Up_Down Signal............................................................................ 7-29
Counter n HW Arm Signal.............................................................................. 7-29
Routing Signals to Counter n HW Arm Input .................................. 7-29
Counter n Internal Output and Counter n TC Signals..................................... 7-29
Routing Counter n Internal Output to an Output Terminal .............. 7-30