考虑到设备的安装,机房还需要有一定的高度,机房的最低净高一般不低于()米。...
Thursday, September 22, 2022
无线列调通信系统使用频率必须(),其他业务不得对其产生有害干扰。...
Tuesday, September 20, 2022
Sunday, September 18, 2022
微波波段用的()必须具有低频谐振电路的基本性能,此外波道系统的谐振腔必须封闭,以免辐射。...
Thursday, September 22, 2022
Wednesday, November 22, 2023
Thursday, September 22, 2022
Thursday, September 22, 2022
Thursday, September 22, 2022
内燃机车、电力机车的机车台由机车直流控制电源系统供电,供电电压范围为()V。机车台电源应能承受浪涌电压为()kV,持续时...
Thursday, September 22, 2022
Thursday, September 22, 2022
填空题无线电波在均匀的媒质中是恒定的速度沿直线的,传播速度是()。...
Friday, August 4, 2023
Thursday, September 22, 2022
Friday, September 16, 2022
单选题VHF电磁波的传输距离可达()公里。A 数十B 数百C 数千D 数万...
Thursday, March 16, 2023
无线工作站STA是基于()条件决定是否发起漫游的改变。...
Thursday, September 22, 2022
SM-R系统中,移动台与BTS之间的接口为(),BTS与BSC间使用的接口为(),BSC与MSC间的接口为()。...
Monday, September 19, 2022
Sunday, March 10, 2024
判断题小区开通半速率后,可容纳的话务量为原来的两倍。A 对B 错...
Friday, November 18, 2022
Friday, August 4, 2023
Thursday, September 15, 2022