电信专业英英词典D-2

　　Delay - This is the wait time between to specific events, and regarding satellite communications, it is the time it takes for a signal to go from the transmission station up to orbit and through the satellite and back down to the receiving earth station (about 1/4 of a second).

　　Delete - This terms means to discard (i.e., destroy) information.

　　Delivery on-orbit - A contractual term describing a service to deliver the satellite at its intended orbital location in space.

　　Demodulation - This is the process of extracting the electrical signal (i.e., the data) from the carrier signal.

　　Demodulator - A satellite receiver circuit which extracts or "demodulates" the desired data from from the received carrier signal.

　　Deviation² - The modulation¹ level of an FM signal determined³ by the amount of frequency the signal is from the frequency of the main carrier signal.

　　Dial - This refers to the sending out of either pulses or tones with the intent of establishing a connection (i.e., a circuit) with another phone or modem⁴.

　　Dialup Modem - This is a modem that is used over normal telephone lines (i.e., not DSL or cable)

　　Dial String - This is the string of characters used to contact another device over telephone lines.

　　Dial Tone - This sound signifies that a telephone is ready to receive instruction (i.e., make a call).

　　Dibit - This is group of two bits.

　　Digital - Referring to communications techniques whereby information and data are encoded as discrete⁵ elements in a binary⁶ language, as opposed to analog⁷ representation of information in variable, but continuous, wave forms.

　　DIP - This is the act of extracting particular information from a database.

　　Diplexer - This is a device which combines two transmitters onto one single transmission line.

　　Dipole - This is an antenna⁸ that is fed from the center (such as rabbit ears).

　　Disconnect - To break a connection (i.e., a circuit) so communication is no longer possible.

　　Domain⁹ - On the internet, a domain is a place to visit with your internet browser¹⁰.

　　Door - This is a software program that allows BBS users to run a program while a user is simultaneously¹¹ using the BBS.

　　Down - This is a general term that means that something is not currently working.

　　Downlink - The segment of a satellite circuit that extends from the satellite to the user terminal (such as, but not limited to, a television).

　　Download - This term means to receive data from another source.

　　Driver - This is a software program that provides instructions to a computer on how to communicate with peripheral¹² devices, such as printers or modems¹³.

　　DTE - see Data Terminal Equipment.

　　DTMF - see Dual¹⁴ Tone Multi-Frequency.

　　DTR - see Data Terminal Ready.

　　DTV - Stands for Digital Television.

1 modulation   

n.调制

参考例句：

• The soft modulation of her voice soothed the infant. 她柔和的声调使婴儿安静了。
• Frequency modulation does not allow static to creep in. 频率调制不允许静电干扰混入。

2 deviation   

n.背离，偏离；偏差，偏向；离题

参考例句：

• Deviation from this rule are very rare.很少有违反这条规则的。
• Any deviation from the party's faith is seen as betrayal.任何对党的信仰的偏离被视作背叛。

3 determined   

adj.坚定的；有决心的

参考例句：

• I have determined on going to Tibet after graduation.我已决定毕业后去西藏。
• He determined to view the rooms behind the office.他决定查看一下办公室后面的房间。

4 modem   

n.调制解调器

参考例句：

• Does your computer have a modem?你的电脑有调制解调器吗？
• Provides a connection to your computer via a modem.通过调制解调器连接到计算机上。

5 discrete   

adj.个别的，分离的，不连续的

参考例句：

• The picture consists of a lot of discrete spots of colour.这幅画由许多不相连的色点组成。
• Most staple fibers are discrete,individual entities.大多数短纤维是不联系的单独实体。

6 binary   

adj.二，双；二进制的；n.双(体)；联星

参考例句：

• Computers operate using binary numbers.计算机运行运用二进位制。
• Let us try converting the number itself to binary.我们试一试，把这个数本身变成二进制数。

7 analog   

n.类似物，模拟

参考例句：

• The analog signal contains high-frequency video information,which helps make up the picture.模拟信号包括有助于构成图像的高频视频信息。
• The analog computer measures continuously,without proceeding step by step.模拟计算机不是一步一步地进行，而是连续地进行量度。

8 antenna   

n.触角，触须；天线

参考例句：

• The workman fixed the antenna to the roof of the house.工人把天线固定在房顶上。
• In our village, there is an antenna on every roof for receiving TV signals.在我们村里，每家房顶上都有天线接收电视信号。

9 domain   

n.(活动等)领域，范围；领地，势力范围

参考例句：

• This information should be in the public domain.这一消息应该为公众所知。
• This question comes into the domain of philosophy.这一问题属于哲学范畴。

10 browser   

n.浏览者

参考例句：

• View edits in a web browser.在浏览器中看编辑的效果。
• I think my browser has a list of shareware links.我想在浏览器中会有一系列的共享软件链接。

11 simultaneously   

adv.同时发生地，同时进行地

参考例句：

• The radar beam can track a number of targets almost simultaneously.雷达波几乎可以同时追着多个目标。
• The Windows allow a computer user to execute multiple programs simultaneously.Windows允许计算机用户同时运行多个程序。

12 peripheral   

adj.周边的，外围的

参考例句：

• We dealt with the peripheral aspects of a cost reduction program.我们谈到了降低成本计划的一些外围问题。
• The hotel provides the clerk the service and the peripheral traveling consultation.旅舍提供票务服务和周边旅游咨询。

13 modems   

n.调制解调器( modem的名词复数 )

参考例句：

• Yes, floppy day, as did 9600 baud dial up modems. 是的，当时软件是最主要的工具，还有9600波特拨号调制解调器。 来自互联网
• Extra settings for configuring BAD modems that cannot identify proper disconnect tone. 额外的设置，配置不好的调制解调器不能确定适当的断开的语调。 来自互联网

14 dual   

adj.双的；二重的，二元的

参考例句：

• The people's Republic of China does not recognize dual nationality for any Chinese national.中华人民共和国不承认中国公民具有双重国籍。
• He has dual role as composer and conductor.他兼作曲家及指挥的双重身分。