These files both require the Modulation Toolkit to be installed. The locations of the files are listed below.
mod_PSK Transmitter.vi
C:\Program Files\National Instruments\LabVIEW 8.x\vi.lib\addons\Modulation\Digital\Support\examples
MT Upconvert Baseband.vi
C:\Program Files\National Instruments\LabVIEW 8.x\vi.lib\addons\Modulation\Analog
Regards,
Chris Delvizis
National Instruments