When no data being transmitted, no carrier signal is on the line.

因此,在无数据传输时, 线路无载波.

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Data are often transmitted in the context of a carrier signal such as sine wave.

数据传输通常采用载波信号,如正弦波.

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It can also realize the result of the high - frequency carrier signal under low switching frequency.

在较低的开关频率下,可实现等效高频载波的效果.

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The communications protocols used by mobile phones often result in low - frequency pulsing of the carrier signal.

移动电话所使用的通讯协议常常造成低频脉冲的载波信号.

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