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关注：1
2013-05-23 12:21
求翻译：基站发射机工作原理是：把由频率合成器提供的频率为766.9125-791.8875MHz的载频信号与168.1MHz的已调信号，分别经滤波进入双平衡变频器，并获得频率为935.0125-959.9875MHz的射频信号，此射频信号再经滤波和放大后进入驱动级，驱动级的输出功率约2.4W，然后加到功率放大器模块。功率控制电路采用负反馈技术自动调整前置驱动级或推动级的输出功率以使驱动级的输出功率保持在额定值上。也就是把接收到的信号加以稳定再发送出去，这样可有效地减少或避免通信信号在无线传输中的损失，保证用户的通信质量。功率放大器模块的作用是把信号放大到10W，不过这也依据实际情况而定，如果小区发射信号半径较大，也可采用25W或40W的功放是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
基站发射机工作原理是：把由频率合成器提供的频率为766.9125-791.8875MHz的载频信号与168.1MHz的已调信号，分别经滤波进入双平衡变频器，并获得频率为935.0125-959.9875MHz的射频信号，此射频信号再经滤波和放大后进入驱动级，驱动级的输出功率约2.4W，然后加到功率放大器模块。功率控制电路采用负反馈技术自动调整前置驱动级或推动级的输出功率以使驱动级的输出功率保持在额定值上。也就是把接收到的信号加以稳定再发送出去，这样可有效地减少或避免通信信号在无线传输中的损失，保证用户的通信质量。功率放大器模块的作用是把信号放大到10W，不过这也依据实际情况而定，如果小区发射信号半径较大，也可采用25W或40W的功放
问题补充： |
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2013-05-23 12:21:38
正在翻译，请等待...
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2013-05-23 12:23:18
Base station transmitter theory is to provide the frequency synthesizer for the frequency of 766.9125 -791.8875 MHz MHz 168.1 carrier frequency signal and the signal has been reduced by the filter, respectively, into a two-frequency converter, and to obtain balance frequency of 935.0125 -959.9875 MH
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2013-05-23 12:24:58
The base depot transmitter principle of work is: The frequency which provides by the frequency synthesizer is the 766.9125-791.8875MHz carrier frequency signal and 168.1MHz has adjusted the signal, passes through the filter to enter the double balanced frequency changer separately, and obtains the f
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2013-05-23 12:26:38
Works for base station transmitter: frequency synthesizer by provided carrier signal on the frequency 766.9125-791.8875MHz and 168.1MHz of the modulated signal, respectively the filter into the double-balanced converter, and frequency for the 935.0125-959.9875MHz of radio-frequency signals, the RF s
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2013-05-23 12:28:18
正在翻译，请等待...
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