Analog Input >> General Properties >> Signal Conditioning >> Excitation >> Source

Data Type:	int32
Description:	Specifies the source of excitation.

Valid values

DAQmx_Val_Internal	10200	Use the built-in excitation source of the device. If you select this value, you must specify the amount of excitation.
DAQmx_Val_External	10167	Use an excitation source other than the built-in excitation source of the device. If you select this value, you must specify the amount of excitation.
DAQmx_Val_None	10230	Supply no excitation to the channel.