在分频多任务（用于模拟讯号），信道切割成次信道，每个信道具有不同的频率宽度，指定给特定的讯号。
In FDM (typically used for analog signals) the channel is subdivided into subchannels, each with a different frequency width that is assigned to a specific signal.
声光晶体由行波场驱动，声场频率则由系统的反馈讯号控制。
The frequency of the sound wave is controlled by the feedback signal of the system.
如果你的接受器没有准确地调到那个信号的频率，所传递的讯号细节就会受到杂音的干扰。
If your receiver isn't precisely tuned to the frequency of the signal, the static interferes with the subtleties of whatever is being transmitted.
再一次，以收音机作比方，当你极其准确地调到那个频率上时，杂音消失了，你就可以听见讯号中过去听不见的微妙之处。
Again, like the radio, when you really get tuned very precisely onto the frequency, the static goes away and you can hear subtleties in the signal that you couldn't hear before.
调幅讯号之频谱为一半强度基频讯号之频谱分别正负位移一射频或载波之频率。
The spectrum of amplitude modulated signal are two half magnitude spectrums of base band signal positive and negative shifted by a carrier or R. F. frequency.
这个无线电讯号的频率是每秒八百千周。
This radio signal has a frequency of 800,000 cycles per second.
研究晶体管变频器在各种振荡状况下及不同讯号频率时对有效变频跨导的影响。
The effective conversion transconductance of transistor converters using a PNP transistor operated at different oscillatory conditions and at various signal frequencies are studied.
频率调制：载波的频率依照调校讯号的瞬时值而改变的一种调制。
Frequency modulation(FM): the form of modulation in which the frequency of the carrier is varied in accordance with the instantaneous value of the modulating signal.
频率调制：载波的频率依照调校讯号的瞬时值而改变的一种调制。
Frequency modulation(FM): the form of modulation in which the frequency of the carrier is varied in accordance with the instantaneous value of the modulating signal.
应用推荐