Method and system for processing a source protocol data unit is provided. A pressure monitoring is performed in the area of the low-pressure air supply and in which, after the transitional phase, the container is vented with respect to an ambient pressure whereby the pressure in the low-pressure air supply is controlled by varying the duration of the transitional phase. Accordingly, performance of the wireless local area network can be improved. The second assembly includes at least one rail pivotally coupled with the top cap. In other embodiments, a multilayer dielectric coating can be positioned between a distal end surface of the reflector and an inner side of a distal end portion of the capillary.