综合专业英语试题

专业英语试题一、词语翻译

1.Electromagnetic induction 电磁感应

2.Broadcasting 广播

3.发射机Transmitter

4.Encoder 编码器

5.光电阴极Photocathode

6.像素Pixel

7.Harmonic structure 谐波结构

8.多路器Mutiplexer

9.电离层Ionosphere

10.Deterministic 确定的

11.功率谱密度power clensity spectrum

12.信噪比signal-to-noise ratio

13.Demodulation 解调，检波14.Nonlinear 非线性的

15.Vacuum-tube 真空（电子）管

16.Modulation coefficient 调制系数

17.Upper side frequency 上边频

18.调制信号modulation signal

19.直流电源DC power suply

20.Quadrature 正交

21.振荡器resonator

22.Inversion 倒置

23.差分difference

24.Cascade 串联，级联

25.Deemphasis 去加重

1.field-effect 场效应管

2.oscilloscope 示波器

rmation 信息，消息，情报

4.optical fiber 光纤

5. signal-to-noise 信噪比

6.bandwidth 基带

7.vocal tract 声带

8.bipolar 双极（线）的

9.decoder 解（译）码器

10.Fourier series 傅里叶级数

11.decibel 分贝

12.modulation 调制，调节

13.amplifier 放大器，扩音机

14. transformer 变压器

15.resonator 振荡器

16.prescribe 指示，规定17.difference差分，差别

18.frequency modulation调频

19.frequency divider分频器

20.viewpoint 观点

21.impurity杂质，混合物

22.nanometers纳米

23.packaging封装

24.very large integration 超大规模集成电路

25.digital signal processing数字信号处理

26. baseband 基带

27.binary二进制编码

28.mainframe 主机，大型机

29.electronic mail电子邮件

30.mobile telephone service移动电话业务

二、英译汉

1.A serial link is often used to attach a computer to a modem.

答案：串口通常用来将计算机和调制解调器连接起来。

2.In the data communications world, data generally are defined as information that

is stored in digital form.

答案：在数据通信领域，数据通常定义成以数字形式存储的信息。

rmation that has been processed, organized, and stored is called data.

答案：经过处理、组织和存储的信息成为数据。

4.Modern communication systems use digital modulation techniques.

答案：现代通信系统采用的是数字调制技术。

5.Digital modulation offers many advantages over analog modulation.

答案：数字调制比模拟调制有更多的优点。

6.In a digital communication system, in order to increase noise immunity, it is

necessary to increase the signal power.

答案：在数字通信系统中，为了增加抗噪性能，需要提高信号的功率。

7.The idea of communication by light probably goes back to signal fires on prehistoric

hilltops.

答案：用光来通信的想法大概可追溯到史前的山顶上的信号火。

8.Phase modulation(PM) and frequency modulation(FM) are special cases of angle

modulated signaling.

答案：相位调制和频率调制是角度调制信号传输的特例。

rmation signals are transported between a transmitter and a receiver over some

form of transmission medium.

答案：信息信号通过某种介质在发射机与接收机之间传送。

10.AM modulators are nonlinear devices with two inputs and one output.

答案：幅度调制器是有两个输入和一个输出的非线性器件。

11.The fundamental purpose of an electronic communication system is to transfer

information from one place to another.

答案：电子通信系统的基本作用是把信息从此地传送到彼地。

（1）Integrated circuits are more of a science,than of a technology.

答案：集成电路与其说是技术，不如说是科学。

（2）The bandwidth of an information signal is the difference between the highest and lowest frequencies contained in the information,and the bandwidth of a communications channel is the difference between the highest and lowest frequencies that the channel will allow to pass through it. 答案：信息信号的带宽就是信息中包含的最高和最低频率之间的频差，通信信道的带宽是可通过该信道的最高和最低频率之差。

（3）In its simplest form,a waveform generator is an oscillator circuit that generates well-defined,stable waveforms that can be externally modulated or swept over a given frequency range.

答案：在最简单的情况下，波形发生器就是一个震荡器，他产生预定的稳定波形，然后再进行调制，或在给定的频率范围内扫描。

（4）In order to reduce the effect of frequency error distortion in telephone system,we have to limit the frequency error to 2-5 HZ.

答案：为了减轻电话系统中的频率误差的影响，我们必须将误差控制在2-5赫兹。

（5）Probably the most significant advantage of angle modulation transmission (FM and PM) over amplitude modulation transmission is noise immunity.

答案:与幅度调制传输相比，角度调制传输（FM和PM）最主要的优点是抗噪声性能好。（6）Because laser wavelength is temperature-sensitive,the control circuits also monitor temperature and control coolers when they are included.

答案：因为激光波长队温度敏感，控制电路需要监控温度，如果有冷却器的话，还要控制他们。

（7）The simplest digital modulation techniques is digital amplitude modulation,which is simply double-sideband,full-carrier amplitude modulation where the input modulating signal is a binary waveform.

答案：最简单的数字调制技术上数字调幅，这种技术是简单的双边带，全载波幅度调制，只