电子与通信技术专业英语UnitⅢ-12课件.ppt

1、Unit Electronic Instrument and ProductsLesson 12 The Oscilloscope New Words virtual v:tul adj. （计算机）虚拟的； hardware h:dw n. 计算机硬件 transform trnsf:m v. 改变； 改观； 变换 transmit trnzmit v. 传输；传送；发送 interpreter int:prit n. 解释者；翻译器 converter knv:t n. 变换器； 换流 器，变压器，变频器 implementation ,implimentein n. 成 就； 贯彻；安装

2、启用 modular mdjul adj. 模块化的 monitor mnit n. 显示屏，屏幕； 计显示器； 监测仪； vi. 监视 synchronization ,sikrnaizein n. 同一时刻； 同步； bus bs n. 计（电脑的）总线 Ethernet i:,net n. 以太网 latency leitnsi n. 潜伏； 潜在因素 integrate intireit v. 使一体化； 使集成 instrumentation ,instrumentein n. 仪器Notes1.It is widely used in design work, trouble-sh

3、ooting and signa1 monitoring, manufacturing and production-line testing, and many other applications where the observation of an electrical waveform is desired. 它被广泛地用于电子设计、故障探测、信号监测、生产制造、流水线检测及许多需要观察电子信号波形的应用场合。 “where”此处不是指地点，而是指“领域”或“应用场合”。2.Oscilloscopes range from the basic, or general-purpose

4、types, to the special-purpose type. 示波器包括从通用示波器到专用示波器的多种类型。 “range from”意为“从.到.变动”或“从.到.范围” 例如： The childrens ages range from 8 to 15. 这些孩子们的年龄在8岁到15岁之间。3.The general purpose oscilloscope is suitable for any of the usual applications in servicing communications, scientific, or industrial work where

5、the frequency of the signal to be observed does not greatly exceed 500 kHz. 通用示波器适用于通信、科学研究、工业生产等各个领域，用来观察频率不超过500kHz以上的电子信号。 “in”意为“在方面”或“在领域”4.Horizontal sweep is a term referring to the action of the horizontal system causing the glowing dot to move across the screen. 水平扫描是这样的术语，它指水平系统使光点沿水平方向扫过屏

6、幕。 “term”意为“术语”， 而“referring”是动词现在分词，作后置定语。5.The trigger is necessary to stabilize a repeating signal. It ensures that the sweep begins at the same point of a repeating signal, resulting in a clear picture as shown in Figure 3-4（b）. 稳定重复显示的波形需要触发。它保证扫描在同一点开始重复显示波形，使波形如图3-4（b）所示清晰地显示。 “resulting in ”

7、是动词现在分词作为伴随状语。 “resulting in”意为“导致”，表结果。 例如： Sometimes I pay, sometimes he pays it seems to average out (ie result in a fair balance) in the end. 有时我付钱, 有时他付钱-到头来似乎两相抵销。Translation of TextsLesson 12 The Oscilloscope One of the most important electronic test and measuring instruments is the oscillosc

8、ope. It is widely used in design work, trouble-shooting and signal monitoring, manufacturing and production-line testing, and many other applications where the observation of an electrical waveform is desired.第第12课课 示波器示波器 示波器是最重要的电子测量仪器之一。它被广泛地用于电子设计、故障探测、信号监测、生产制造、流水线检测及许多需要观察电子信号波形的应用场合。 Oscillos

9、copes range from the basic, or general-purpose types, to the special-purpose types .The general purpose oscilloscope is suitable for any of the usual applications in servicing communications, scientific, or industrial work where the frequency of the signal to be observed does not greatly exceed 500

10、kHz. 示波器的类型包括通用示波器和专用示波器。通用示波器适用于通信、科学研究、工业生产等各个领域，用来观察频率不超过500kHz以上的电子信号。 Fig. 12-1 is a simple block diagram that shows how an analog oscilloscope displays a measured signal. When you connect an oscilloscope probe to a circuit, the voltage signal travels through the probe to the vertical system of

11、 the oscilloscope. 图12-1是一个简单的方框图，表示了模拟示波器是如何显示被测信号的。当你把示波器探头连上电路，电压信号则通过探头进入示波器的垂直系统。 The signal travels directly to the vertical deflection plates of the cathode ray tube (CRT). Voltage applied to these deflection plates causes a glowing dot to move. (An electron beam hitting phosphor inside the C

12、RT creates the glowing dot.) A positive voltage causes the dot to move up while a negative voltage causes the dot to move down. Depending on how you set the vertical scale (volts/div control), an attenuator reduces the signal voltage or an amplifier increases the signal voltage. 信号直接进入阴极射线管（CRT）的垂直偏

13、转板。加在这个偏转板上的电压使光点运动。（电子束撞击CRT内的荧光屏上产生光点）。正电压使光点向上运动，而负电压使光点向下运动。衰减器减小显示的信号电压或放大器增大显示的信号电压，取决于你如何调节垂直偏转旋钮（volts/div 控制旋钮）。 The signal also travels to the trigger system to start or trigger a horizontal sweep. Horizontal sweep is a term referring to the action of the horizontal system causing the glow

14、ing dot to move across the screen. Triggering the horizontal system causes the horizontal time base to move the glowing dot across the screen from left to right within a specific time interval. 信号还进入触发系统开始或触发“水平扫描”。水平扫描是指水平系统使光点沿水平方向扫过屏幕。对水平系统的触发使水平时基电路在专门的时间间隔内让光点从左至右扫过屏幕。 The trigger is necessary

15、to stabilize a repeating signal. It ensures that the sweep begins at the same point of a repeating signal, resulting in a clear picture as shown in Figure12-2（b）. 稳定重复显示的波形需要触发系统。它保证扫描在同一点开始重复显示波形，使波形如图12-2（b）所示清晰地显示。 In conclusion, to use an analog oscilloscope, you need to adjust three basic setti

16、ngs to accommodate an incoming signal: The attenuation or amplification of the signal. Use the volts/div control to adjust the amplitude of the signal before it is applied to the vertical deflection plates. 总之，使用模拟示波器时，为了完全显示连续出现的信号波形，需要调节三个基本按键： 衰减或增大信号：使用“volts/div”控制键，以便在信号还未加到垂直偏转板之前调节信号的振幅。 The

17、 time base. Use the sec/div control to set the amount of time per division represented horizontally across the screen. The triggering of the oscilloscope. Use the trigger level to stabilize a repeating signal. 时基：使用“sec/div”控制键，设置屏幕水平方向每格所代表的时间长短。 示波器的触发：使用“触发电平”控制键稳定重复显示的信号。 Also, adjusting the foc

18、us and intensity controls enables you to create a sharp, visible display. Fig 12-3 is diagram of oscilloscopes panel. 还可以调节聚焦和亮度控制旋钮，以保证显示的波形尖锐和可以看见。图123为示波器的面板图。Exercises1. Write T (True) or F (False) beside the following statements about the text.a. The general purpose oscilloscope is suitable for

19、 special-purpose applications. b. The general purpose oscilloscope is used in servicing communications, scientific, or industrial work where the frequency of the signal to be observed does not greatly exceed 1000 kHz.c. The signal travels directly to the vertical deflection plates of the cathode ray

20、 tube (CRT).d. Voltage applied to these deflection plates causes a glowing dot to less.e. A positive voltage causes the dot to move down while a negative voltage causes the dot to move up.2. Fill in the missing words according to the text.a. One of the most important _ and _ is the oscilloscope.b. I

21、t is widely used in design work, _ and _, manufacturing and production-line testing, and many other applications where the observation of an electrical _ is desired.c. Oscilloscopes range from the _, to the special-purpose types .d. When you connect an oscilloscope probe to a circuit, the _ travels

22、through the probe to the vertical system of the _. e. An electron beam hitting phosphor inside the _ creates the glowing dot.f. The signal also travels to the trigger system to start or trigger a _.3. Translate the following paragraph into Chinese. In conclusion, to use an analog oscilloscope, you n

23、eed to adjust three basic settings to accommodate an incoming signal: The attenuation or amplification of the signal. Use the volts/div control to adjust the amplitude of the signal before it is applied to the vertical deflection plates. The time base. Use the sec/div control to set the amount of time per division represented horizontally across the screen. The triggering of the oscilloscope. Use the trigger level to stabilize a repeating signal. Also, adjusting the focus and intensity controls enables you to create a sharp, visible display. Fig 15-3 is diagram of oscilloscopes panel.End