为研究电磁脉冲串重复率变化对数字通信电台阻塞效应的影响, 以某型数字通信电台为受试对象, 通过电磁脉冲注入试验, 研究了受试电台误码率随电磁脉冲串幅度、重复率的变化规律。结果表明, 重复率在50 Hz及其以下时, 同一脉冲重复率下, 随着脉冲幅度的增大, 受试电台误码率随之增大, 在达到敏感度判据标准后趋于稳定。不同脉冲重复率下, 电磁脉冲重复率与受试电台敏感误码率之间存在线性关系, 电磁脉冲重复率越高, 受试电台测得的误码率越大, 且受试电台误码率达到敏感误码率标准时, 脉冲幅值在允许的实验误差内基本相同, 通过分析可推测, 脉冲重复率在414 Hz以下时, 电台的阻塞效应属于单脉冲阻塞效应的累加, 只有达到一定重复率后脉冲作用才会出现重叠, 此时的敏感电压值会随着重复率的增大而减小。

In order to study the blocking effect of digital communication stations with the change of the electromagnetic pulse train repetition rate, an electromagnetic pulse injection test was performed on a digital communication station. The bit error rate (BER) of the radio stations follow the change of amplitude and repetition rate of the electromagnetic pulse train was studied. The results show that the BER of the radio station increases with the the pulse amplitude when the repetition rate is below 50 Hz. The BER no longer changes after reaching the sensitive BER. There is a linear relationship between the repetition rate of the electromagnetic pulse and the sensitive BER of the radio station. The higher the repetition rate, the higher the BER. The pulse amplitude is basically the same within the allowable experimental error when the BER reaches the sensitive BER. It can be inferred from the analysis that the blocking effect of the radio station is the accumulation of single-pulse blocking effects when the pulse repetition rate is below 414 Hz. The pulse effect time will overlap only at repetition rate over 414 Hz. And the sensitive voltage will decrease with the increases of repetition rate.