User's Manual

Chapter 2 Function Reference — AO_VScale
NI-DAQ FRM for PC Compatibles 2-44
© National Instruments Corporation
Notice that refVoltage is the value you specify in AO_Configure. Because you can
independently configure the analog output channels for range and polarity, NI-DAQ can
translate the same voltage to different values for each channel.
Note Some inaccuracy results in the
binVal
parameter when you use this function on
the VXI-AO-48XDC, because this device works with a larger analog output
resolution than can be represented by the 16-bit binary output value for
AO_VScale
.
The binary output value is designated as the most significant 16 bits
of the scaling operation to minimize this inaccuracy. Use the
AO_VWrite function
to prevent this kind of inaccuracy.