在所有的综合电子系统中,信号消隐处理是有效提高其电磁兼容性的一种实用技术。本文以机载ESM系统为例,着重分析并论述了常用的硬件电路的软件程序两类消隐法。在此基础上,又提出了一种实用效果更为理想的第三类消隐法——软硬复合式消隐。其相关检测原理和消隐处理流程对研制新的ESM系统和增强其它航空电子系统的电磁兼容性均有一定的参考价值。 In all integrated electronic systems, signal blanking is a useful technique for effectively improving its electromagnetic compatibility. Taking the airborne ESM system as an example, this paper focuses on analyzing and discussing two kinds of blanking methods of software programs commonly used in hardware circuits. On this basis, we propose a third kind of blanking method with better practical effect - hard and soft compound blanking. The related detection principle and blanking process have certain reference value for developing new ESM system and enhancing the EMC of other avionics systems.