Photovoltaic structures for the conversion of solar irradiance into electrical free energy. In particular, the system is able to accommodate receipt and demodulation of at least 8 and 16-VSB modulated signals in order to support US HDTV applications, as well as 64 and 256-QAM modulated signals, for European and potential US CATV implementations. Two pairs of lift arms are pivotally attached to the base unit. Using the information stored in the dump file, the execution state of all active processes and the state of network connections of the virtual server are restored at the destination node to the state existing immediately prior to on-the-fly migration. The lever is connected with a first end of a steering arm via a first rotary joint. The IP identification of the packets are compared to the captured IP address of the generated IPSec packet.