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五、立体声广播解调原理在导频制立体声广播接收机中,鉴频级从调频载波上解调出来的信号,还不是已经分解了的左、右声道音频信号,而是立体声复合信号.此信号中还有抑载平衡调幅波,需要进一步解调才能分解出左、右声道信号来.这一过程称立体声解调,完成此功能的电路称立体声解调器.因为,立体声复合信号的上、下包络线具有时分码的特征,故又有些著述称立体声解调器为立体声解码器.
Fifth, the principle of stereo broadcast demodulation In the pilot system stereo radio receiver, the frequency level from the FM carrier demodulated signal is not already the decomposition of the left and right channel audio signal, but the stereo composite signal. This signal is also suppressed balance AM, need further demodulation to break down the left and right channel signal to this process, said the stereo demodulation, the completion of this function circuit called the stereo demodulator because the stereo composite signal The upper and lower envelopes have the characteristics of time-division code, so some books describe the stereo demodulator as a stereo decoder.