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In the telemetry system, the core to ensure the high reliability of the system is whether sources can fully simulate the test system or not.FPGA is designed as the control chip, Communicate with the host computer via the PCI bus, The stable output of analog signals, time command signals, variable frequency pulse signals is completing by combining the integrated design of hardware and software. The long-term experiments proof:analog signals output stably. Output error is ±30 mV, pulse signals output pulses of different frequencies fixed numbers and accordancing with the requirementswith accurately, system data transfer rates up to 40 Mbps.