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3-33
Channel Settings
By default, the counter outputs the pulses on a default PFI terminal. Refer to Chapter 5,
Signal Routing and Clock Generation
, for more information
You can change the output terminal by using the CO.Pulse.Term DAQmx Channel property.
Timing Settings
For a continuous waveform, use the DAQmx Timing (Implicit) VI or function. Set the Sample
Mode input to Continuous Samples.
Triggering Setting
By default, the NI 6612 begins generating the waveform when the DAQmx Start Task VI or
function is called. The NI 6612 can also begin generating pulses in response to a digital trigger.
Figure 3-39 shows an example where pulses are generated in response to a digital trigger.
Figure 3-39.
Start Trigger Initiates Waveform Generation
To use a start trigger, call the DAQmx Start Trigger (Digital Edge) VI or function. Inputs to this
VI or function include:
•
Source
—Specifies which terminal to use as the Start Trigger signal.
•
Edge
—Specifies a rising or falling edge.
The following DAQmx Trigger properties configure the Start Trigger:
•
Start.Delay
,
Start.DelayUnits
—Specifies the delay from when the trigger occurs to when
the NI 6612 begins generating pulses.
Note
Even if the Start.Delay is set to 0, the NI 6612 inserts a minimum delay equal
to two ticks of the counter timebase.
•
Start.DigEdge.DigFltr.Enable
,
Start.DigEdge.DigFltr.MinPulseWidth
—Enables and
configures a digital filter on the start trigger input. This filter eliminates noise on the start
trigger signal. Refer to Chapter 4,
, for more information.
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Содержание NI 6612
Страница 1: ...PCIe 6612...
Страница 2: ...NI 6612 User Manual NI 6612 User Manual November 2013 374008B 01...
Страница 11: ...NI 6612 User Manual National Instruments xi Appendix B Technical Support and Professional Services...
Страница 94: ...National Instruments 7 1 7 Calibration For the NI 6612 calibration is not required...