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通过详细分析频率调制原理,得出调频的输入信号与有效频带的关系。并分析常用的双通道电视发射机的双工器的工作原理,得出发射机的输入信号与双工器的吸收负载功率的关系。
By analyzing the principle of frequency modulation in detail, the relationship between the input signal of FM and the effective frequency band is obtained. And analyzes the working principle of the duplexer of a common dual-channel television transmitter, and obtains the relationship between the input signal of the transmitter and the absorbed load power of the duplexer.