def METHOD_NAME(self):
    """
    Instantiate a datacube and apply basic calibrations
    """
    datacube = DataCube(data=np.arange(np.prod((4, 5, 6, 7))).reshape((4, 5, 6, 7)))
    # calibration
    datacube.calibration.set_Q_pixel_size(0.062)
    datacube.calibration.set_Q_pixel_units("A^-1")
    datacube.calibration.set_R_pixel_size(2.8)
    datacube.calibration.set_R_pixel_units("nm")
    return datacube