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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.
P is the effective radiated power in the major lobe (max) in the horizontal plane (in watts, kW, etc.). Units of Field Intensity. There is also a great deal of confusion in the vocabulary for field strength (also called field intensity). Values are commonly expressed in dBu, dB V, and dBm.Each unit has both merit and common usage in certain disciplines in the radio communications industry.: There is a great deal of confusion when engineers, technicians, and equipment salespersons talk about units of antenna gain and field strength. People in different disciplines of the radio telecommunications industry seem to be speaking different languages and most people are not multi-lingual.