There is no evaluation version of the Modulation Toolkit because the toolkit is comprised of only LabVIEW VIs (or functions). So, there is not a way currently to give access online to those functions for only a 30 day period. However, I linked the Baseband Developers Kit below for reference. The kit is composed of a series of whitepapers, tutorials and examples (to run the examples you will need the toolkit). Baseband Developers Kit
http://digital.ni.com/express.nsf/bycode/baseband