Firstly my apologies for posting known quantities, I guessed that members would like to see in what way I tinkered with usrp_rx_cfile.py. point taken though.
Screen shots of the MATLAB plots as well as the usrp_oscop.py output can be found at:
I have upped the input freq to 250KHz, now attempting a square wave (in desperation) and
set the options.freq to 0 in --->self.u.tune(0, self.subdev, options.freq)