With the widespread application of digital array radar in air combat, the testing requirements for digital array modules—its core components—have become increasingly urgent. Traditional manual testing methods struggle to meet the high-precision, rapid repair and inspection demands. By integrating the host computer's testing software and hardware resources, the phase-synchronized design of four clock excitation signals required for DAM automatic testing was achieved, eliminating the rigid constraints imposed by external local oscillator reference sources. Experiments demonstrate that the automated execution of testing sequences, data acquisition, and processing analysis for metrics such as transmit pulse SNR and receive SNR has been fully realized, reducing single-module testing time to the ten-minute level. Moreover, the consistency and reliability of test results significantly outperform traditional manual methods. This system has now been officially deployed in the testing process of a certain type of digital array module, providing critical support for applications like experimental debugging and field maintenance.