In this paper,we design a device which can generate arbitrary intermediate frequency output in the receiving and frequency conversion system,the output frequency range from 10MHz to 160MHz,the frequency step is 1Hz,also,the power of output IF provide four modes for selection,which is -10dBm、-5dBm、0dBm、5dBm,respectively.The device is applied to a signal analyzer,and the phase noise at frequency offset 10kHz is up to 120dBc/Hz.The device realizes the arbitrary IF output in the microwave and millimeter wave receiving and frequency conversion system,and provides greater flexibility for the analysis and processing of the following signals.%设计了一种在接收变频系统中产生任意中频输出的装置，输出中频频率范围10MHz～160MHz，频率步进1Hz，并且输出中频功率提供4档进行选择，分别为-10dBm、-5dBm、0dBm和5dBm。将该装置应用到某信号分析仪中，10kHz频偏处的相位噪声可达-120dBc/Hz。本装置实现了微波毫米波接收变频系统的任意中频输出，为后续信号的分析处理提供了更大的灵活性。
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