Small-signal interface test system and method

The embodiment of the invention relates to the technical field of the test, and discloses a small-signal interface test system and method. A work station host is used for establishing a simulation model, and the simulation model with a first parameter value is transmitted to a real-time simulator; the real-time simulator is used for resolving the simulation model to obtain a second parameter value, and transmitting the second parameter value to a power amplifier through a small-signal interface; the power amplifier is used for producing a third parameter value according to the second parametervalue, and transmitting the third parameter value to the real-time simulator through the small-signal interface; and the work station host is used for acquiring a test result of the small-signal interface. The real-time simulator is used for resolving the simulation model established by the work station host so as to acquire a test parameter value, the test parameter value is transmitted to the power amplifier through th