A plc signal anti-attenuation test system

Abstract

Compared with the prior art, the PLC signal anti-attenuation test system disclosed in the present application includes: a three-phase purification circuit; a test subsystem connected to the three-phase purification circuit; system; a test circuit set between the test subsystem and the accompanying test subsystem; the test subsystem includes: a first filter module connected to a three-phase purification circuit at one end; a first isolation module connected with the first filter module; A first artificial power network module at the output end of the isolation module; a PLC to be tested STA connected to the first artificial power network module; a second isolation module disposed between the first artificial power network module and the PLC to be tested STA. Compared with the prior art, the technical solution involved in the present invention can effectively perform signal isolation, reduce the risk of networking, and has a wide range of applications, and can perform anti-attenuation tests without reducing the power of product equipment.

Description

technical field [0001] The present application relates to the field of PLC signal testing, and more particularly, to a PLC signal anti-attenuation testing system. Background technique [0002] Power line communication, PLC for short, is a technology that uses the existing power line network carrier for broadband communication. It mainly transmits data by loading the carrier signal on the AC or DC line. The signal can be transmitted, and there is no problem of poor penetration of wireless products. Due to the uncertainty of the clutter and noise on the power line of the transmission medium, it is necessary to test the transmission performance and reception performance of the PLC power carrier product, also called the anti-attenuation test. [0003] The purpose of the anti-attenuation test is to test the maximum attenuation value that PLC signal transmission can withstand, that is, the maximum attenuation value that can be connected to the normal communication between the tes...

AI Technical Summary

Problems solved by technology

However, for this type of solution, when the power of the test product is too large, the signal will be coupled, causing the attenuator to fail, and the test result cannot be obtained. It is necessary to reduce the power of the product itself during the test, and then compensate it after the test; but for some If the power cannot be reduced or the reduced power cannot be linear and the test plan of the PLC product corresponding to dbm, the test cannot be performed, resulting in the inability to obtain the maximum attenuation value

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