User Guide

© National Instruments Corporation 63 NI cDAQ-9172 User Guide and Specifications
Frequency Output can be routed to any output PFI terminal. The FREQ
OUT signal also can be routed to DO Sample Clock and DI Sample Clock.
In software, program the frequency generator as you would program one of
the counters for pulse train generation.
For information on connecting counter signals, refer to the Default
Counter/Timer Routing section.
Frequency Division
The counters can generate a signal with a frequency that is a fraction
of an input signal. This function is equivalent to continuous pulse train
generation.
For information on connecting counter signals, refer to the Default
Counter/Timer Routing section.
Counter Timing Signals
In slots 5 and/or 6 of the NI cDAQ-9172 chassis, you can configure
C Series correlated digital input/output modules as one of the following
counter timing signals:
• Counter n Source
• Counter n Gate
• Counter n Aux
• Counter n A
• Counter n B
• Counter n Z
• Counter n Up_Down
• Counter n HW Arm
• Counter n Internal Output
• Counter n TC
•Frequency Output
In this section, n refers to either Counter 0 or 1. For example,
Counter n Source refers to two signals—Counter 0 Source (the source
input to Counter 0) and Counter 1 Source (the source input to Counter 1).