更多"[多选题] 我局目前配备电台使用的无线通信频率主要频段有：（）；（多选"的相关试题:
[单选题]
某甚高频电台工作频率范围是118MHz～136.975MHz，
该电台可提供25kHz频率间隔的信道总数是____。
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[多选题]我局目前配备的无线电台终端有（）；（多选）
A. 350M PDT手持台
B. 350M PDT车载台
C. 350M PDT基地台
D. 1.4G LTE手持台
[判断题]
只有和电台工作频率相近的无线电波才能对电台产生
干扰。
A.正确
B.错误
[单选题]两个以上电台使用同一频率而产生的干扰是（ ）。
A.邻道干扰
B.同频干扰
C.阻塞干扰
D.杂散干扰
[判断题]每个波段设有10个电台频率存储器，各保存10个电台的播音频率
A.正确
B.错误
[判断题]两个以上电台使用同一频率而产生的干扰是同频干扰。
A.正确
B.错误
[多选题]下列不是两个以上电台使用同一频率而产生的干扰是（ ）。
A.邻道干扰
B.同频干扰
C.阻塞干扰
D.杂散干扰
[单选题]
各无线电台站频率一经指定，（）。
A.可以随时变更
B.每隔一年变更一次
C.不准自行变更
D.以上都不对
[单选题]应急定位发射机是在飞机遇险后，向外界发出救生信号时使用的。三频率电台的发射频率为121.5MHz、( ) 和406MHz。
A.243MHz
B.224MHz
C.245MHz
D.304MHz
[判断题]非封存的抢救车因使用频率高，不必配备基数卡。
A.正确
B.错误
[单选题] 单选题 民用航空电台专用频率是由( )管理。
A. 国务院民用航空主管部门
B. 空管局
C. 广电总局
D. 省级无线电管理委员会
[判断题]
当干扰电台的频率等于或接近于VHF接收机的中频频
率时，干扰信号和有用信号在检波输出产生差拍，此
干扰信号称为互调干扰。
A.正确
B.错误
