The invention comprises an array of ADCs, associated either with spatially separated signal input devices such as for example antennae, or with a single signal input device and a plurality of filters having a variable phase delay, which provide a digital output which is processed to remove spurious signals introduced by the ADCs thereby providing a linearised output. Moveover, since the test device may be operationally inserted into a backplane, the present invention may be effectively used in a variety of environments including, but not limited to, those constrained by space considerations, andor to those that are subject to vibrations due to their operational nature. The apparatus includes a display board having front and back panels and having a configuration indicative of a festive occasion. An integrated multidimensional sorter may be implemented using integrated circuit technology using one or more integrated circuits. A plurality of equally thick intermediate absorbing layers are disposed between adjacent QW groups. The ECU controls the engine in accordance with a condition different from a condition used to control the engine in the CS mode, if the engine is started at least due to decrease in a state of charge of the battery while the vehicle is controlled in the CD mode.