早期的移动电话使用模拟信号，他比后来的数字信号手机发射出功率更强的信号。
Earlier mobile phones used analogue signals which emitted higher power signals than the later digital models.
每个蜂巢装备有小功率的无线电发射器和接收器，使信号能在手机用户之间传播。
Each cell is equipped with a low-powered radio transmitter and receiver that permit propagation of signals among cell-phone users.
功率分析仪可控制只读取在信道内的发射功率，假定该手机要发射信号。
The RF power analyzer is programmed to read the power only in the channel in which the mobile device is supposed to be transmitting.
功率分析仪可控制只读取在信道内的发射功率，假定该手机要发射信号。
The RF power analyzer is programmed to read the power only in the channel in which the mobile device is supposed to be transmitting.
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