The field strength instrument is, as its name implies, an instrument for measuring field strength. The measurement value of the field strength instrument is μ V/m, which has a length unit M. In principle, the voltage value measured by the meter(or voltmeter) is at the input port of the instrument, and the voltage(or potential) measured by the field strength meter is the voltage that the antenna senses at a certain point in the air. Strictly speaking, the field strength meter consists of an electric meter and an antenna.
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