A design of 4-channel wide band wave generation based on the Line Replaceable Module (LRM) framework is presented. The card integrates a high performance FPGA and 4 Digital Analog Converter(DAC) chips. The DAC and FPGA connect each other by the Low Voltage Differential Signaling (LVDS) interface. The input and output interface of the board utilizes a 2nd generation LRM connector. The DAC sampling rate is 4 Gsps. The instantaneous bandwidth is up to 1.2 GHz at 2.4 GHz Intermediate Frequency(IF) output, and the Signal-to-Noise Ratio(SNR) is better than 50 dB. It can be applied to the radar EW and the wideband digital receiver.