This is a MATLAB App that allows the Tektronix MDO34 to be used for frequency domain analysis by performing a swept sine analysis using the built-in AFG. The MATLAB App installation file is: MDO34 Signal Analyzer.mlappinstall
More information and directions for using the app are available at: http://www.swarthmore.edu/NatSci/echeeve1/Ref/MDO34Gui/
The directions I used for downloading and installing necessary drivers are in the file "Tek MDO34 Software.pdf". I think there may be more steps than necessary in the file, but it worked for me.