Chapter 5 Analog Output
© National Instruments 5-5 X Series User Manual
size. The advantage of using FIFO regeneration is that it does
not require communication with the main host memory once
the operation is started, thereby preventing any problems that
may occur due to excessive bus traffic. Use the NI-DAQmx
AO channel property, UseOnlyOnBoardMemory to enable or
disable FIFO regeneration.
• With non-regeneration, old data is not repeated. New data
must be continually written to the buffer. If the program does
not write new data to the buffer at a fast enough rate to keep
up with the generation, the buffer underflows and causes an
error.
Analog Output Triggering
Analog output supports two different triggering actions:
• Start trigger
•Pause trigger
An analog or digital trigger can initiate these actions. All X Series devices
support digital triggering, but some do not support analog triggering. To
find your device’s triggering options, refer to the specifications document
for your device. Refer to the AO Start Trigger Signal and AO Pause Trigger
Signal sections for more information about these triggering actions.
Connecting Analog Output Signals
AO <0..3> are the voltage output signals for analog output channels 0, 1, 2,
and 3. AO GND is the ground reference for AO <0..3>.
Figure 5-2 shows how to make analog output connections to the device.
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