A low-voltage power line carrier channel noise test system and method for field use
A low-voltage power line and noise test technology, applied in the direction of noise figure or signal-to-noise ratio measurement, can solve the problems of insufficient analysis function, poor portability, large size, etc., and achieve the effect of strong anti-interference ability, low cost and high sampling rate
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[0038] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0039] This embodiment proposes a low-voltage power line carrier channel noise test system for use in the field. The test system includes a transformer, a coupler, a data acquisition card and a signal processing device; the transformer is a power frequency transformer, and the power frequency transformer is stepped down The power frequency signal of the power line is used as the reference power frequency signal of the data acquisition card, and the data acquisition card collects the signal on the power line of the grid through the coupler, and transmits it to the signal processing device, and the signal processing device The data is analyzed in the time domain and the frequency domain, and the specific connection is: the transformer and the coupler are connected in parallel to the power line of the power grid, and the out...
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