用示波器测量一个信号的频率时，应合理选择扫描时间，使显示屏上至少显示一个完整的周期。（ ）

相关题目

• Single GLS can serves all runway ends and in one airports.（
• The GBAS channel range is restricted to （ ） so that the chan
• The GLS System eliminates need for “critical areas ” required fo
• The GLS System eliminates need for “critical areas ” required fo
• Single GLS can serves all （ ）and in some cases multiple airp