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With the development of different types of signal receivers. In order to meet the signals’ requirement of multiple characteristic and parameter adjustability which is used in receivers’ testing, signal production technologies are studied. According to the present radar, communication signal .etc. a new-style multi-signal modulator based on virtual instruments (VI) and field program gate arrays (FPGA) is designed. Multi-types signal modulating software was developed using C language based on LabWindows/CVI. The data transfer is controlled by the software and FPGA. Signal data is stored to Double Data Rate 3Gen (DDR3) Memory via peripheral component interconnect express (PCIE) interface and bus. Then data is red out from DDR3 memory to digital-to-analog converter (DAC) module. Eventually, signals were output using two channels after transferred to analog type. Compared with traditional modulators, great improvements of the proposed software and hardware architecture lie in integration, universality, flexibility, expandability, system cost. The test results proves that modulator can work well, and its performance fulfills the requirement of the design and usage.