System for testing low voltage power line carrier communication

The utility model provides a system for testing low voltage power line carrier communication. The system comprises a signal generator, a power amplifier, a first coupler, an AC electric quantity tester and an oscilloscope. The signal generator is used for generating a radio-frequency signal. The power amplifier is connected with the signal generator, and is used for amplifying the power of the radio-frequency signal to obtain a radio-frequency signal the power of which is amplified. The first coupler is connected with the power amplifier and a household electrical appliance, and is used for coupling the radio-frequency signal the power of which is amplified, and introduces the coupled radio-frequency signal into the household electrical appliance. The AC electric quantity tester is connected with the first coupler, and is used for acquiring power consumption and power frequency impedance of the household electrical appliance. The oscilloscope is connected with the household electrical appliance through a second coupler, and is used for displaying the radio-frequency signal introduced into the household electrical appliance. By employing the system for testing low voltage power line carrier communication, the test for the electromagnetic compatibility of low voltage power line carrier communication and the household electrical appliance can be achieved.