To Generate a Bretschneider Spectrum:
Most likely the 2.22 Lab will be doing this.
The matlab script (attached to this page) generates the motion points. LabView on the Wavemaker Control Computer converts these points to a voltage that moves the wavemaker accordingly.
Note: The formatting for LabView to read these points in is annoying and requires 1) the standard lvm header and 2) a tabbed empty column to the left of the data points.
These things should be set in LabView already. But in case you have to change things ..