NI-PXI analog I/O range configuration

[MVotava]

Hello,

I'm currently developing control of voltage source in LabView 2012. The voltage and current limitation of each channel of the source is controlled by analog outputs of FPGA of NI-PXI. However the resolution of the outputs is only 16 bits. Is possible to reduce the output range to gain higher sensitivity. In FPGA I/O palette, I have found the I/O settings but there is no option to configure range. Is possible to change the range in my FPGA Target application?

Thank you replies 

[MVotava]

After reading again the documentation, I found out that the analog outputs have fixed range, therefore it can't be changed.