National Instruments NI 783xR Manuel D’Utilisation

The bipolar output range of the NI 783xR AO channels is fixed at 

±10 V. 

Some applications require that the AO channels power on to known voltage 
levels. To set the power-on levels, you can configure the NI 783xR to load 
and run a VI when the system powers on. The VI can set the AO channels 
to the desired voltage levels. The VI interprets data written to the DAC in 
two’s complement format. Table 2-3 shows the ideal AO voltage generated 
for a given input code.

If your VI does not set the output value for an AO channel, then the AO channel 

voltage output will be undefined.

The AO signals are AO <0..n> and AOGND.

AO <0..n> are the AO channels. AOGND is the ground reference signal for 
the AO channels.

Figure 2-9 shows how to make AO connections to the NI 783xR.

Table 2-3.  Ideal Output Voltage and Input Code Mapping

Full-scale range –1 LSB

9.999695

7FFF

Full-scale range –2 LSB

9.999390

7FFE

Midscale

0.000000

0000

Negative full-scale range, 
+1 LSB

–9.999695

8001

Negative full-scale range

–10.000000

8000

Any output voltage

—

AO Voltage

10.0 V

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