Range (V)
Specifies the value of the input range the digitizer uses for the channel. For example, to acquire a sine wave that spans from -5.0 to 5.0 volts, set this parameter to 10.0.
Refer to the NI High-Speed Digitizers Help for a list of vertical ranges supported by the digitizer. If the specified range is not supported, the value is coerced up to the next valid range.