Electro-magnetic interference detecting system for power line conduction
A technology for conducting electromagnetic interference and detection systems, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of complex EMI test systems and difficulty for testers to master, and achieve convenient and reliable detection process, easy operation, and detection system simple effect
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[0017] The present invention will be further described below in conjunction with specific examples, but the present invention is not limited.
[0018] The power line conduction electromagnetic interference detection system of the present invention includes the following parts: EMI receiver, linear impedance stabilization network (LISN), current probe, which are connected into a system in turn (see attached figure 1 ).
[0019] The EMI receiver includes the following parts (see attached figure 2 ): Input attenuator, preselector, high frequency amplifier, mixer, IF filter, envelope detector, detector weighting, local oscillator.
[0020] The working process of the EMI receiver is: first neutralize the input RF signal processed by the attenuator, preselector, and amplifier with the mixer; by adjusting the frequency of the local oscillator, a fixed intermediate frequency can be obtained; then through the intermediate frequency filter After processing, the resolution of the anal...
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