无线电频率

Guglielmo Marconi, recognizing the possibility of using these waves for a wireless communication system, gave a demonstration (1895) of the wireless telegraph, using Hertz's spark coil as a transmitter and Edouard Branly's coherer (a radio detector in which the conductance between two conductors is improved by the passage of a high-frequency current) as the first radio receiver.

Guglielmo Marconi，认可使用这些波浪的可能性为一个无线通信系统，给了一次示范(1895)无线通信机，使用赫兹的火花卷因为发射机和Edouard Branly 的coherer (导率在二个指挥之间被高频率潮流段落改进)的一台无线电探测器如同第一无线电接收机。

Electronics A false signal in telecommunication links from beats between signal frequency and sampling frequency.

假信号：信号频率和取样频率之间的拍子在无线电通信线路产生的假信号 adv。

The lower limit of what frequencies constitute "radio" is not precisely defined, but 5 kHz is a widely accepted starting point for the radio spectrum.

低限什么频率构成"收音机"精确地不被定义，仅5 千赫是一个广泛被接受的起点为无线电光谱。

Aircraft navigation system, one or more ground navigation station with the provisions of the frequency of launching radio beacon signals (such as wave, audio wave modulation or code), aircraft flight navigation equipment according to the received beacon signal measured or calculated aircraft Solutions relative to the navigation ...

飞机导航系统中，一个或几个地面导航台用规定的频率发射无线电信标信号（等幅波、音频调制波或代码），飞机机上导航设备根据收到的信标信号测出或解算出飞机相对于导航。。。

Aircraft navigation system, one or more ground navigation station with the provisions of the frequency of launching radio beacon signal (amplitude wave, audio wave modulation or code), aircraft flight navigation equipment according to the received beacon signal measured or calculated aircraft Solutions relative to the navigation ...

飞机导航系统中，一个或几个地面导航台用规定的频率发射无线电信标信号（等幅波、音频调制波或代码），飞机机上导航设备根据收到的信标信号测出或解算出飞机相对于导航。。。

Radio engineers already had a fairly good understanding of how the sunspot cycle affected lower frequency transmissions, especially at frequencies below 30 MHz.

无线电工程师已经有相当好理解对怎样黑点周期影响了更低的频率传输，特别是以频率在30 兆赫以下。

This anti-bugging device can trace concealed microphones, closed-circuit televisions, radios, laser-based wall snoopers, hidden cameras, etc. it can also scan a wide-ranging spectrum to detect spying devices from Japan, Germany and the United States which use different radio frequency.

这次反窃听装置，可以追踪隐蔽麦克风，闭路电视，收音机，基于激光的墙窥探者，隐藏的照相机等，也可以扫描一个范围广泛的频谱侦测间谍设备从日本，德国和美国使用不同的无线电频率。

E Retrieves. Organiser vehicle arrangements, vehicles to be provided by competitors, HQ telephones for outlanders, retrieve radio frequencies.

回收。主办单位车辆的安排、提供的参赛人员的车辆、给目标取区袜降落人员之总部电话、回收的无线电频率。

The beam waveguide tube transfers the radio frequency energy from the focus of the main reflector into the pedestal room to the receiver.

束波导管转让无线电频率能量的焦点主要反射成的基座室到接收者。

The mines are made cheaply from fertilizer, syringes and building materials and can be detonated by pressure devices such as tripwires, or by remote control using radio frequencies or mobile-phone signals.

这些廉价的地雷都是由化肥、注射器以及建筑材料制成，可通过绊网一类的装置增压引爆，也可通过无线电频率或手机信号进行遥控引爆。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。