As test manner of the frequency modulation system digital radio which uses by feeble transmission electricity the short wave as a carrier and

摘要

PROBLEM TO BE SOLVED: To provide a test method for short wave modulation type digital radio by minute power and a test fixture, which can prevent the mutual interfer ence in adjacent test stations by minute power.;SOLUTION: A test method for short wave modulation type digital radio by minute power has iron net cages, which houses an emitter and a receiver in each test station of production line. The test method is provided with an interference emitter of carrier which does not contain a signal whose frequency is the same as emitter between two iron net cages. When two test stations simultaneously conduct the test, radio waves which radiates to the outside, are attenuated by the iron net cage, is interference-destroyed by the radio wave of the interference emitter. The radio waves are attenuated again by the iron net cage, covered with the radio waves inside of the iron net cage and the radio waves is attenuated, before the radio waves interference-destroyed reaches to another receiver.;COPYRIGHT: (C)2003,JPO