This circuitry shifts the carrier wave to a higher frequency when it wants to send a 1 or to a lower frequency when it wants to send a 0.

当该电路要发送 1 ，将载波移至更高；当该电路要发送 0 ，将载波移至更低。

Note that the comparison to a traffic light which emits one color and then another is a little inaccurate because your smartphone's circuitry generates one frequency, called a carrier wave.

请注意， 与发出一种颜色然后发出另一种颜色的交通信号灯的比较有点不准确， 因为智能手机的电路产生一种，称为载波。