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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.
Thus, there is no reliable safety distance for neighborhood power lines. In general, a magnetic field level of 0.5 mG will be reached somewhere between 10 and 200 feet from the wires. But you cannot tell by simply looking up at the power lines. You have to test on-site with a gaussmeter to be sure.