Oscilloscope

Physics Department Kuwait University
February, 2001

EXP. NINE Course 127

Cathode-ray ambit (CRO)
Objective
To introduce the basic structure of a cathode-ray Oscilloscope. To get well-known(prenominal) with the use of different control switches of the device. To visualize an ac signal, meter the amplitude and the frequency.

Theory
Cathode-ray Oscilloscope The device consists mainly of a hoover tube which contains a cathode, anode, grid, X&Y-plates, and a fluorescent disguise (see Figure below). When the cathode is heated (by

Fluorescent screen Electron heavy weapon Deflection plates

Cathode

Anode

Y-plates

Electron beam Grid X-plates

Figure 1: The basic structure of a CRO applying a microscopical potential going crosswise its terminals), it emits electrons. Having a potential difference between the cathode and the anode (electrodes), accelerate the

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emitted electrons towards the anode, forming an electron beam, which passes to fall on the screen. When the dissipated electron beam strikes the fluorescent screen, a bright plain spot is produced. The grid, which is situated between the electrodes, controls the amount of electrons passing by dint of it thereby controlling the intensity of the electron beam.



The X&Y-plates, atomic number 18 responsible for deflecting the electron beam horizontally and vertically. A drag on generator is connected to the X-plates, which moves the bright spot horizontally across the screen and repeats that at a certain frequency as the source of the signal. The voltage to be studied is applied to the Y-plates. The combine sweep and Yvoltages produce a graph showing the variate of voltage with time, as shown in Fig. 2. Front panel The search panel of the CRO is shown in Fig. 2.

Power The trace excitement X-posit. Time/Div Focus Y-posit. Y-posit.

Volt/Div X-mag Ch1

Volt/Div Ch2

Figure 2: The front panel of the CRO Alternating current (ac) An ac signal can be of different forms: sinusoidal, square, or triangular. The sinusoidal...If you urgency to get a full essay, order it on our website: Orderessay



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