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Field strength meter is actually a simple receiver. After a tuner circuit, the signal is detected and fed to a microammeter, which is scaled in dBÅ³. The frequency range of the tuner is usually within the terrestrial broadcasting bands.Some FS meters can also receive satellite (TVRO and RRO) frequencies.he relation between the electric field and the transmitted power [edit]. In ideal free space, the electric field strength produced by a transmitter with isotropic radiator is readily calculated.
The Gauss meter works by reading a current that is induced by a magnetic field that is radiated through a coil of thin wires which is inside device. The circuitry inside the Gauss meter amplifies the induced current, thus enabling it to measure as low as 0.1 mg.