PLC signal anti-attenuation test system

Abstract

Compared with the prior art, the PLC signal anti-attenuation test system disclosed by the invention comprises a three-phase purification circuit; the test subsystem is connected with the three-phase purification circuit; an accompanying test subsystem which is arranged in parallel with the test subsystem and has the same architecture with the test subsystem; the test circuit is arranged between the test subsystem and the test accompanying subsystem; the test subsystem comprises a first filtering module of which one end is connected with the three-phase purification circuit; the first isolation module is connected with the first filtering module; the first artificial power supply network module is arranged at the output end of the first isolation module; the PLC to-be-tested STA is connected with the first artificial power supply network module; and the second isolation module is arranged between the first artificial power supply network module and the to-be-tested STA of the PLC. According to the technical scheme, compared with the prior art, signal isolation can be effectively carried out, the risk of network crossing is reduced, the application range is wide, and an anti-attenuation test can be carried out without reducing the power of product equipment.

Description

technical field [0001] The present application relates to the field of PLC signal testing, and more specifically, relates to a PLC signal anti-attenuation testing system. Background technique [0002] Power line communication, referred to as PLC, is a technology that uses the existing power line network carrier for broadband communication. It mainly transmits data by loading carrier signals on AC or DC lines. Its advantage is that it does not need to use additional cables, but only through household wires. The signal can be transmitted, and there is no problem of poor penetration of wireless products. Since the clutter and noise on the power line of the transmission medium are uncertain, it is necessary to test the transmission performance and reception performance of PLC power carrier products, also known as anti-attenuation testing. [0003] The purpose of anti-attenuation test is to test the maximum attenuation value that PLC signal transmission can withstand, that is, t...

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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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