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transmitters, such as wireless (cellular/cordless) telephones and ground mobile radio base
stations, amateur radios, AM/FM radio broadcasting and television broadcasting, cannot
accurately predict their electric field in theory. In order to evaluate the electromagnetic
environment of fixed radio frequency transmitter, the survey of electromagnetic field should
be considered. If the measured product is located in a place where the electric field is higher
than the above RF level, the product should be observed to verify its normal operation. If
abnormal performance is observed, supplementary measures may be necessary, such as
reorienting the direction or location of the product. In the whole frequency range from 150
KHz to 80 MHz, the Electric field should be less than 3 V/m.