机载通信系统,尤其甚高频通信系统是最重要的飞机机载设备之一。因为它是飞机起降阶段飞行员和塔台指挥员相互交流的唯一设备。甚高频通信所用的频率高,传播距离近,以空间波传播,电波受对流层的影响比较大,也受地形的限制。由于甚高频通信系统十分重要,因此一旦发生故障,可能会造成比较严重的后果,尤其是最容易被飞行员所忽略的自动发射抑制故障。 Airborne communication systems, especially very high frequency communication systems, are among the most important aircraft onboard devices. Because it is the only equipment that pilots and tower commanders exchange with each other during take-off and landing phases. VHF communications are used at high frequencies and near propagation distances, which propagate through space waves. The radio waves are more affected by the troposphere and are also subject to terrain constraints. Due to the importance of VHF communication systems, failure in the event of a very high frequency may have serious consequences, especially if the automatic launch suppression, which is the most easily overlooked by pilots.