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Auto-test system synchronization for improving reliability and efficiency of the test system is very important, the synchronization technology based on the state report system provides higher efficiency and better security than the software delay method.In order to solve the problem of instruction synchronization in automatic test system,this paper discusses the Status report model, register and synchronization mechanism of IEEE488.2 and SCPI,studies the principle and method of automatic measurement system synchronization by using the SCPI status reporting mechanism ;Through theoretical analysis and examples,analyzes the timing relations and key technologies of several measurement instruction synchronization methods,summarizes and compares the differences and applications of several synchronization methods,solves the problem of automatic measurement system synchronization.