An apparatus operative to decode a barcode on a target object includes a mirror located within the housing at a position generally facing both the curved window and the imaging lens arrangement of the scan engine. During testing a frequency divider circuit in the integrated circuit divides a local oscillator signal to a frequency below a normal operating range of the local oscillator. The fuel system further includes piping that is coupled to the pump and is operatively connected to the internal combustion engine. An array of antenna elements is also described, as well as an ultra low profile phased array antenna system.