An MPEG-based user interface device and a method of controlling a function using the same are provided. The evaporator includes a fluid tube, a liquid organic solvent supply device for supplying the organic solvent liquid to one end of the fluid tube, and heating units for heating the fluid tube. The workpiece is supported by one or more support tools, each of which transmits the electromagnetic field so that the support tools are not substantially heated by the electromagnetic field. A frequency signal source is configured to provide a plurality of first samples of the frequency signal taken at a first sampling frequency according to the internal reference signal.