To accomplish time delay scanning, variable delay networks are inserted in front of each radiating element. 要完成时滞扫描,就要把延时网络插入每个辐射单元的前端。
In communications,a condition that occurs in a network when no circuits are available and a busy tone is returned to the calling part. 在通信技术中,当无线路可用因而有忙音返回给主呼叫用户时网络的一种状态。