The former one is now widely used in the monopulse system to calibrate the amplitude and phase imbalances between the sum and difference channels by injecting test signals.

• 离线校正的方法是现阶段单脉冲雷达系统进行和差通道幅相校正采用的主要方法，它通过注入测试信号的方法来得到对误差接收通道幅相特性的估计。