Chapter 7

Analog Output

The source also can be one of several internal signals on your DAQ device.

Refer to Device Routing in MAX in the NI-DAQmx Help or the

LabVIEW 8.x Help for more information.

You also can specify whether the waveform generation begins on the rising edge or falling edge of ao/StartTrigger.

Routing AO Start Trigger Signal to an Output

Terminal

You can route ao/StartTrigger out to any PFI <4..7> or PFI <12..15> terminal.

The output is an active high pulse.

AO Pause Trigger Signal

Use the AO Pause Trigger signal (ao/PauseTrigger) to mask off samples in a DAQ sequence. That is, when ao/PauseTrigger is active, no samples occur.

ao/PauseTrigger does not stop a sample that is in progress. The pause does not take effect until the beginning of the next sample.

If you are using any signal other than the onboard clock as the source of your sample clock, the generation resumes as soon as the pause trigger is deasserted and another edge of the sample clock is received, as shown in Figure 7-4.

Pause Trigger

Sample Clock

Figure 7-4.ao/PauseTrigger with Other Signal Source

Using a Digital Source

To use ao/PauseTrigger, specify a source and a polarity. The source can be the PFI <0..3> or PFI <8..11> signals.