A clamp comprises an anvil and a jaw member moveable relative to the anvil between a secured positioned and an unsecured positioned. The assembly can be formed by juxtaposing a first electrically conductive element overlying a major surface of a first semiconductor element with an electrically conductive pad exposed at a front surface of a second semiconductor element. These signals are conveyed towards N antenna input connectors of the receivers to be tested. This allows for production of a tandem-type illumination device having further improved luminance uniformity. A judgment unit outputs position information and category information of a high-order feature present in the input data, on the basis of the output from the time-sequential consolidation module.