The present application relates to a method of installing a pre-cast pile in the ground which involves applying an enlarged head forming tool to the ground until a volume of soil has been displaced or removed so as to form a void at the surface of the ground. The switching mixer and charge integrator produce a sampled data format, double sideband signal with serial cancellation of the switching mixer’s alias responses. The second LGPs are disposed beside the first light incident surface. In particular, each client daemon may include an operations log and an applied log sequence number.