大多数电视台都会在转换过程中使用备用天线，从发射塔卸下老式的模拟天线，而代之以新的数字天线塔杆。
Most television stations will use backup antennas during the transition while their old analogue ones are taken down from their towers and replaced with new digital masts.
雪大的时候，曼塔克小姐经常会提出让他住进备用卧室，但这位加拿大小伙子却坚持露营在外。
Miss Mantack would often offer her spare bedroom when the snow was heavy, but the Canadian was determined to carry on camping.
该测试设备用于与塔康信标模拟器连接。
The test set is used in conjunction with TACAN Beacon Simulators.
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