tiáo pín
意思解释：（Frequency modulation）调频广播。 “频率调制”的简称。使载波的瞬时频率按照所需传送信号的变化规律而变化，但保持振幅不变的调制方法。
使载波的振幅保持不变，而它的瞬时频率依照所需传递信号的变化规律而变化。1947年《科学画报》第十三卷第二期:“这种电冲再改成一种发音信号，然后由一个调频电台向天空广播。”1948年顾均正《从原子时代到海洋时代·人造月亮…
Make the amplitude of carrier wave keeps changeless, and the metabolic rule that place of its instantaneous frequency according to wants to transmit signal and change. 1947 scientific pictorial does thirteenth coil the 2nd period: Stop tomb figure of Wei of hut value red tip of bamboo-plaited basket or suitcase of delay of of ox of lotus root of sell of ⒁ of location of some tip extensive archives of post Bao kneecap fines silk ㄏ Jia brights the ァ that exhibit Cui! 948 year Gu Junzheng arrive from atomic age moon of man-made of marine times · ...
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