Chapter 4
46
Connecting Signals for Frequency Measurement
Operations
One way to measure frequency is to use the same wiring as a
standard event counting application that does not use a gate (see
), then use the Windows timer to determine the
duration of the frequency measurement. The frequency of the
Counter 0 Clock signal is the number of counts divided by the
duration of the Windows timer.
If you need more accuracy than the Windows timer can provide, you
can connect a pulse of a known duration (such as a one-shot output of
counter/timer 1) to the Counter 0 Gate input.
shows how to
connect counter/timer signals to your own screw terminal panel. In
this case, the frequency of the Counter 0 clock input is the number of
counts divided by the period of the Counter 0 Gate input signal.
Figure 21: Connecting Counter/Timer Signals to a Screw Terminal Panel for
a Frequency Measurement Operation Using an External Pulse
11
28
Counter 1 Out
8
Signal Source
Counter 0 Clock
33
Digital Ground
Screw Terminal Panel
Counter 0 Gate
Summary of Contents for KUSB-3116
Page 10: ...Contents x...
Page 14: ...About this Manual xiv...
Page 15: ...1 1 Overview Hardware Features 2 Supported Software 4 Getting Started Procedure 5...
Page 20: ...Chapter 1 6...
Page 26: ...Chapter 2 12...
Page 64: ...Chapter 4 50...
Page 65: ...51 5 Verifying the Operation of a Module Overview 53 Running the Quick Data Acq Application 54...
Page 75: ...61 A Ground Power and Isolation Connections...
Page 78: ...Appendix A 64...
Page 82: ...Index 68...