An RF treatment apparatus includes a catheter with a catheter lumen. A baseband digital processing module operates cooperatively with an analog signal processing module to effectuate highly adjustable and highly accurate gain adjustment in accordance with transmitter processing within a communication device. Furthermore, as an alternative or in addition thereto, the semiconductor circuit devices to be tested are disposed and connected up in at least one stack. In addition, the materials in the device are environmentally friendly. A fixed end cap is provided for an end of the window covering opposite the compression mount assembly and for abutting against an opposite side of the window frame. The method determines whether the fluid-ejection nozzle ejected fluid upon firing based on the temperature andor firing resistance of the fluid-ejection nozzle.