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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.
A tensiometer is an instrument used for measuring the moisture content of soil. It indicates the physical forces of gravity and molecular bonding that must be overcome in order to pull water out of the soil. The water held in the soil is known as the matrix water potential.