standby radio channel 备用无线电信道
If only one channel is available in the frequency band equipment protection can be optionally implemented with a1 + 1hot standby configuration.
如果频带中只有一个信道可用，可以选择使用1 + 1热备用配置实现设备保护。
A standby HD channel featuring live soccer matches or sports events taking place at the same time such as UEFA Champions League, UEFA Europa League etc.
备用高清频道，将直播在同一时间举行的欧洲联赛冠军杯、欧霸杯球赛及其他体育赛事。
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