This test only requires a signal generator and oscilloscope, which can quickly and intuitively determine the same name end/different name end through waveform phase, without the need for complex calculations; Balancing high-frequency (such as 10kHz signal) and ordinary (such as 50Hz signal) transformers, with flexible signal amplitude adjustment and adaptability to multiple types of products; Synchronization can assist in verifying the turns ratio of transformers by comparing waveform amplitudes.