电信专业英英词典F-1

 

　　Fade - This is a reduction in the received signal. It is caused by absorption, refraction, or reflection.

　　Fax - This is a shortening of Facsimile, and it refers to one fax machine sending a digital representation of a hardcopy over the phone lines to be received and printed out by another fax machine.

　　FCC - see Federal Communications Commission

　　F/D - the ratio of antenna¹'s focal length to the antenna's diameter. If there is a greater F/D it means there is a shallower dish.

　　FDM - see Frequency Division Multiplexing.

　　Feature - This term refers to any of the tasks that a particular piece of equipment can perform or carry out.

　　Feed - this (1) describes the physical feed system of the antenna, and (2) describes the actual signal transmission of the data or information from the distributors.

　　Feedback - This occurs when part of the output signal returns to the input² side of the electronic device.

　　Federal Communications Commission (FCC) - This is the government agency that regulates all interstate communications that originate within the United States. The FCC has no intrastate authority.

　　Field - This refers to the particular location of a piece of data within a record (which is within a file of a database).

　　File - This term refers to any intended collection of data with similar characteristics. A file could be anything from a document to a component³ of a computer program.

　　Filter - This is a device which allows a particular spectrum⁴ (range of frequencies) to pass through it but prohibits (attenuates) all others from passing.

　　Firewall - This is a system of both software and hardware, and it has purpose of limiting the vulnerability of a computer or set of computers from outside attack (i.e., hacking).

　　Flash - This is a function on a telephone or other phone device that rapidly hangs-up and reconnects the telephone line.

　　Flag - In programming, this is a variable that is used to relay when a particular condition of the program has been met.

　　Flow Control - This is a method of controlling the transfer of information (messages, characters, etc.) between a network's data points.

1 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。

2 input   

n.输入(物)；投入；vt.把(数据等)输入计算机

参考例句：

• I will forever be grateful for his considerable input.我将永远感激他的大量投入。
• All this information had to be input onto the computer.所有这些信息都必须输入计算机。

3 component   

n.组成部分，成分，元件；adj.组成的，合成的

参考例句：

• Each component is carefully checked before assembly.每个零件在装配前都经过仔细检查。
• Blade and handle are the component parts of a knife.刀身和刀柄是一把刀的组成部分。

4 spectrum   

n.谱，光谱，频谱；范围，幅度，系列

参考例句：

• This is a kind of atomic spectrum.这是一种原子光谱。
• We have known much of the constitution of the solar spectrum.关于太阳光谱的构成，我们已了解不少。