问题:测距误差不仅取决于脉冲前沿的上升时间,还与其所测量()有关。...
Friday, September 16, 2022
问题:数字通信系统与模拟通信系统相比突出优点是可利用()技术可以提高系...
Monday, September 12, 2022
问题:两个相邻或相近的波道,所传输的信号超过了波道的宽度,从而对临近波...
Monday, September 12, 2022
问题:两个距离较近的发射机,一个在150MHz频段,另一个在280MH...
Friday, September 16, 2022
问题:《中华人民共和国无线电管理条例》第二十五条规定,处理无线电频率相...
Friday, September 16, 2022
问题:遥控台DTR100配备了若干200kHz带阻腔体滤波器,它与带通...
Thursday, September 15, 2022
问题:电流型漏电保护器是通过检测()进行动作来达到保护目的的。...
Monday, September 12, 2022
问题:模拟信号和数字信号之间()没有信息损失的相互转化。...
Friday, September 16, 2022
Thursday, September 15, 2022
Friday, September 16, 2022
Monday, September 12, 2022
Thursday, September 15, 2022
问题:主被叫用于的通话直流电由程控交换机提供,其电压一般为()伏。...
Thursday, September 15, 2022
Friday, September 16, 2022
Thursday, September 15, 2022
问题:《中华人民共和国飞行基本规则》第一百一十条规定,飞行气象保障的组...
Friday, September 16, 2022
Friday, September 16, 2022
Friday, September 16, 2022
Friday, September 16, 2022
问题:《民用机场管理条例》规定,在运输机场内进行不符合运输机场总体规划...
Monday, September 12, 2022