There is described a receiver of at least one radiofrequency modulated signal deriving from an antenna external to the receiver; the receiver comprises a first stage for the low noise amplification of the radiofrequency modulated signal and a demodulation stage of the above-mentioned signal. This allows minimizing the entrance of vegetable residues, dust and moist soil, while also aiding in their expulsion, and provides an efficient and prompt way for cleaning to avoid longer out of service times of the machine. This process may be used on all CMP layers in thin film magnetic head wafer fabrication. The address translation data from a successful lookup from either the first lookup or the second lookup is used to map a simulated physical address to a virtual address of the emulator. The projection lens projects the first, second and third color light beams carrying corresponding image signals from the second PBS to a screen.