Finite Pulse Train Generation - National Instruments DAQ X Series User Manual

Chapter 7 Counters

Finite Pulse Train Generation

This function generates a train of pulses with programmable frequency and
duty cycle for a predetermined number of pulses. With X Series counters,
the primary counter generates the specified pulse train and the embedded
counter counts the pulses generated by the primary counter. When the
embedded counter reaches the specified tick count, it generates a trigger
that stops the primary counter generation.
Counter Armed
Source
Enablex
Ctrx
In Legacy Mode, this counter operation requires two counters and does not
use the embedded counter. For example, to generate four pulses on
Counter 0, Counter 0 generates the pulse train, which is gated by the paired
second counter. The paired counter, Counter 1, generates a pulse of desired
width.
Counter 0 is always paired with Counter 1. Counter 2 is always paired with
Note
Counter 3.
The routing is done internally. Figure 7-30 shows an example finite pulse
train timing diagram.
X Series User Manual
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Figure 7-29. Finite Pulse Train Generation: Four Ticks Initial Delay, Four Pulses
Counter 1
(Paired Counter)
Counter 0
Figure 7-30. Finite Pulse Train Timing in Legacy Mode
7-32
Generation
Complete
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