A demonstration arrangement for controlling a plurality of television sets or other controllable electronic devices has one or more programmed processors. One system includes at least one radiation scanning camera-head, an array of at least one pixelated radiation detector having an imaging surface including a two dimensional array of pixels, and a scanning unit positioned between the radiation detector and the object. Then press pause and then push the PICTURE COPY, then your copy of that image will come out from the top of the Picture Scanner. The memory device stores at least one corresponding control condition and one instruction. The IF signal may be a digital signal and the DFE is configured to output the IF signal via a serial or parallel interface.