Oscilloscope

Physics Department Kuwait University February, 2001 EXP. NINE Course 127 Cathode-ray arena ( oscilloscope) Objective To introduce the basic structure of a cathode-ray Oscilloscope. To collar well-known(prenominal) with the use of different control switches of the device. To visualize an ac signal, molar concentration 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 light disguise (see Figure below). When the cathode is heated (by Fluorescent screen negatron heavy weapon Deflection plates Cathode Anode Y-plates Electron beam control 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 amidst the cathode and the anode (electrodes), accelerate the 42 emitted electrons towards the anode, forming an elec tron beam, which passes to fall on the screen. When the dissipated electron beam strikes the light 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 color 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 crosswise the screen and repeats that at a certain frequency as the source of the signal. The voltage to be studied is a pplied to the Y-plates. The immix sweep an! d Yvoltages produce a graph showing the variation of voltage with time, as shown in Fig. 2. Front panel The try panel of the CRO is shown in Fig. 2. Power The trace ignition 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 spur to get a full essay, order it on our website: BestEssayCheap.com

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