一般的调频广播发射机，发射频率是固定的。
The current market FM broadcasting launchers have their frequencies fixed.
这个是发射机,发射频率是，这是接收机,接收频率f撇。
Let this be the transmitter f which produces frequency f, and here is the receiver which receives the frequency f prime.
发射部分采用最先进的频率合成技术，发射频率稳定。
The emission part adopts the most advanced frequencies synthetic technique, having stable emission frequency.
这些需求根据信道带宽和发射频率改变，控制允许发送的频谱。
These requirements govern the allowed spectrum of a transmission and vary according to the bandwidth of the channel and the frequency of transmission.
遥控设备的范围可辐射整个飞行区，发射频率对机场和航班的通讯无任何影响。
Range of remote control device can radiate entire flight-run, and transmitting frequency throws no impact on airport and airliner communication.
这种方法采用频率搜索和跟踪相结合，软件和硬件相结合，以适应发射频率的快速变化。
This kind of method, combining search with track, combining hardware with software, can adapt the quick change of transmission frequency.
还有一种不同的软件是通过让电脑发射频率在200赫兹到600赫兹的声波，驱赶蚊子。
Still having a kind of different software is launch frequency to arrive in 200 hertz through letting computer the sound wave of 600 hertz, drive mosquito.
对固定的声源深度，发射频率大的声场对应的声强起伏大，且相邻距离处起伏的强度很剧烈；
For a fixed sound source depth, the acoustical fields caused by high send frequency has strong sound intensity fluctuation, and their variation is sharp enough in an adjacent range.
功率分析仪提供了功率和发射频率的信息，也可以克服由于功率计有限视频带宽而引起的的错误读数。
An RF power analyzer provides both power and transmission frequency information, and can also overcome false readings associated with an RF power meters limited video bandwidth.
它是人们于1951年发现的太空氢原子的天然发射频率，宇宙间任何一种射电天文学家都必定知道它。
It is the natural frequency of emission of the hydrogen atoms in space and was discovered by us in 1951; it must be known to any kind of radio astronomer in the universe.
可控源时间域电磁法应用在海底探测，需要确定装置参数，通过实验和理论计算确定了发射频率的最大值；
For a sea-floor transient electromagnetic exploration system, its maximum transmitting frequency may be chosen as 200 Hz by supposing the sea-floor as horizontal thin conductive plates.
通过对钻井取心岩样压入硬度及模拟剪切的破岩试验，探寻利用岩石的声发射频率来判别井下岩石类型的可能性。
Through compaction hardness and analog shear rock failure test to drilling core, the paper discusses the possibility of discriminating downhole rock type by using rock acoustic emission frequency.
减少能量旨在产生一个低频范围，这在地震预测上具有重要的使用价值，但是降低发射频率将会给海洋生物带来些许麻烦。
The goal is to reduce the energy emitted to produce the lower frequency range that is useful for seismic, while decreasing the emission of frequencies said to cause trouble for Marine life.
将流程泵叶轮叶片和压水室的隔舌看作旋涡发生体，在不同运行工况下在叶片后缘以及隔舌两侧串联发生的卡门涡街的发射频率是不同的。
The emission frequency of the Karman vortex street occurred in series from the blades and tongue is varing with the running condition.
移动电话是低功率射频发射器，运行频率为450至2700兆赫，峰值功率为0.1至2瓦。
Mobile phones are low-powered radiofrequency transmitters, operating at frequencies between 450 and 2700 MHz with peak powers in the range of 0.1 to 2 watts.
单个天线的工作频带覆盖了例如由无线电系统所使用的频率范围或者只是该频率范围内的发射频带或接收频带。
The operating band of an individual antenna covers e. g. the frequency range used by a radio system or only the transmitting or receiving band in that range.
仅当辐射频率大于某一最小值即极限频率时，物体才会发射出电子。
Electrons are ejected from the object only when the frequency of the radiation is greater than a certain minimum value, called the threshold frequency.
一发射器，用以输出一具第二中心频率的一射频信号；
一发射器，用以输出一具第二中心频率的一射频信号；
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