In a particular illustrative embodiment, a method is disclosed to present assets related to media content. A next step includes assigning an interim identity and interim IP address to the user device. The apparatus includes a draw down unit and a control system for closed loop control of the draw down unit. An amplitude or phase of one of the generated plurality of constant envelope signals is corrected using signal components included in the amplified plurality of constant envelope signals. Limiting the lowest temperature prevents freezout of the individual refrigerant. The synthetic tube is packaged within a sealed watertight enclosure that maintains sterility of the tube.