If you have NI hardware already installed, with the Measurement & Automation Explorer, NI-DAQ 7.4 now gives us the ability to simulate the installation of many of NI's DAQ boards, including a limited simultation of what signals they might return. Otherwise, buiding a waveform and then fanning it out to multiple channels with the addition of offsets and noise on a per channel basis shouldn't be too hard.
P.M.
PutnamCertified LabVIEW Developer
Senior Test Engineer North Shore Technology, Inc.
Currently using LV 2012-LabVIEW 2018, RT8.5

LabVIEW Champion