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示波器原理及使用 PowerPoint PPT Presentation


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示波器原理及使用. 一、 示波器的基本结构.   示波器的种类很多,但它们都包含下列基本组成部分,如附图 1 - 1 所示。. 附图 1 - 1 示波器的基本结构框图. 1 、主机. 主机包括示波管及其所需的各种直流供电电路,在面板上的控制旋钮有:辉度、聚焦、水平移位、垂直移位等。. 2 、垂直通道. 垂直通道主要用来控制电子束按被测信号的幅值大小在垂直方向上的偏移。 它包括 Y 轴衰减器, Y 轴放大器和配用的高频探头。 通常示波管的偏转灵敏度比较低,因此在一般情况下,被测信号往往需要通过 Y 轴放.

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示波器原理及使用

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11

11


1

2

YY Y


YYYYYYYYYY Y

Y


Y ()101(11)

3

3.1

X


3.2

X

3.3


1

Y1Y2Y1Y212Y2Y2Y1


Y1Y2Y2Y1

Y2Y1


Y2Y113(a),13(b)


1-2

1-3


2

XY


XX

CA8020


1

20MHz020MHz5mV/DIV5V/DIV1015V/DIVTV0.5S/DIV0.2S/DIV1020nS/DIV


2

14

14


3

1)

20MHz220V10%

2)

A


B

C101CH1

D

ECH2CH2CH2D

3)


A

CH1CH2CH2CH1CH2CH2CH1CH2


B

DC

AC

GND

C(V/div)


(V/div)

4)

A

50Hz

B


CH11

CH22

CH11CH2212AC CH1CH2


5)

A(t/div)

(t/div)1010

B


20Hz

20Hz

CH2CH2


C

D

4


1

6div

1.1)

ACH1CH2

BY

Vp-p = (div)(V/div)


1.2)

A

BGND

C

DDCY(div)

V divV/div


2)

X(46)div

2.1

X

= divt/div


2.2

10%90%1-5

1010


2.3

ACH1CH2

B

C

DCH1CH2CH1CH2

ECH1CH2AC1-6DT


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