Microtek instruments is the manufacturer of selective rf receiver for measuring levels, c.A 47. The product is a selective rf receiver which is able to measure the levels captured by an antenna on a high dynamic from -10 to -130dbm. It has adjustable selectivity between 1khz and 1mhz usable over its full range of frequencies between 25mhz and 2.5ghz. Selective rf receiver is associated with odometer and gps. Sue to its high-speed measurement acquisition capability, it is particularly suitable for measurements made when mapping an electrical field radiated by a transmitting station. The salient features of the selective rf receiver for measuring levels: