author of scope and field relay for cordless phones and mobile phones and gsm operating in etas

摘要

use the author node works with cell phones, cordless phones, gsm and in shady areas where the signal is constrained by the obstacles.designed for the extension of scope between external and internal factories, offices, houses, apartment buildings, underground areas, camping, playing fields, hotel, etc.or in the internal or external of all cases sopraindicati.operativita'is composed of three main parts: (a) linear power amplifier for transmission.(b) preamplificatore linear low noise and intermodulazione of antenna reception.(c) sampler of antenna which allows the coupling with the apparatus radiotelefonico without the aid of electrical interconnection and, above all, without tampering with the equipment.